{"title":"Gas","description":"","products":[{"product_id":"mq-3-alcohol-gas-sensor","title":"MQ-3 Alcohol Gas Sensor","description":"\u003cp\u003eThis alcohol sensor is suitable for detecting alcohol concentration in your breath, just like your common breathalyzer. Sensor provides an analog resistive output based on alcohol concentration.When the sensor is present in the environment in which the alcohol vapor, the sensor's conductivity increases with the concentration of alcohol gas in the air increases.Using a simple circuit can be converted to the change in conductivity of the gas concentration with the corresponding output signal.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh quality double panel design, with power indicator and TTL output signal\u003c\/li\u003e\n\u003cli\u003eHave DO switch signal(TTL) output and AO analog signal output\u003c\/li\u003e\n\u003cli\u003eTTL output signal for low level effectively. (when the low output electric signal lights at ordinary times, can be directly connect single chip microcomputer or relay module)\u003c\/li\u003e\n\u003cli\u003eAnalog output voltage with concentration, the higher concentration, the higher voltage\u003c\/li\u003e\n\u003cli\u003eHas better sensitivity with the liquefied petroleum gas, natural gas, city gas, smoke\u003c\/li\u003e\n\u003cli\u003eHas long service life and reliable stability\u003c\/li\u003e\n\u003cli\u003eRapid response recovery features\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003ePin Description:\u003c\/b\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVCC:\u003c\/b\u003e Positive (5 v)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGND:\u003c\/b\u003e Connect power negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDO:\u003c\/b\u003e TTL switch signal output\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAO:\u003c\/b\u003e Analog signal output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical properties:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput voltage : DC5V Power consumption ( current ): 150mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDO output : TTL digital 0 and 1 ( 0.1 and 5V)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial note:\u003c\/strong\u003e After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265267333,"sku":"SN-000061-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/rc031-4-pin-mq-3-alcohol-gas-sensor.jpg?v=1767555011"},{"product_id":"mq-4-methane-gas-sensor","title":"MQ-4 Methane Gas Sensor","description":"\u003cp\u003eMQ-4 Methane Gas Sensor, the ideal solution for detecting CH4 and CNG gases. With its advanced features and high sensitivity, this sensor ensures accurate and reliable gas detection in a wide range of applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWide Range Sensitivity: The MQ-4 Methane Gas Sensor offers excellent sensitivity to combustible gases, allowing it to detect a variety of gases efficiently.\u003c\/li\u003e\n\u003cli\u003eHigh Sensitivity to CH4 and Natural Gas: With its specialized design, this sensor provides exceptional sensitivity to CH4 and natural gas, ensuring accurate and timely detection.\u003c\/li\u003e\n\u003cli\u003eSmall Sensitivity to Alcohol and Smoke: The sensor exhibits minimal sensitivity to alcohol and smoke, preventing false alarms and ensuring accurate gas detection.\u003c\/li\u003e\n\u003cli\u003eFast Response and Stability: The MQ-4 sensor boasts a fast response time, enabling quick detection of gas presence. Additionally, it offers exceptional stability and long life for extended and reliable operation.\u003c\/li\u003e\n\u003cli\u003eSimple Drive Circuit: Featuring a straightforward drive circuit, this sensor is easy to integrate into existing systems or projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSensor Type: Semiconductor\u003c\/li\u003e\n\u003cli\u003ePower Requirements: VCC – 5V±0.1\u003c\/li\u003e\n\u003cli\u003eDigital Output (DO): TTL digital 0 and 1 (0.1 and 5V)\u003c\/li\u003e\n\u003cli\u003eAnalog Output (AO): 0.1-0.3 V (relative to pollution), maximum concentration voltage of about 4V\u003c\/li\u003e\n\u003cli\u003eDetection Gas: Natural gas\/Methane\u003c\/li\u003e\n\u003cli\u003eDetection Concentration: 200-10000ppm (Natural gas \/ Methane)\u003c\/li\u003e\n\u003cli\u003eInterface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)\u003c\/li\u003e\n\u003cli\u003eHeater Consumption: Less than 750mW\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: 14 to 122 °F (-10 to 50°C)\u003c\/li\u003e\n\u003cli\u003eRH Related Humidity: Less than 95%Rh\u003c\/li\u003e\n\u003cli\u003eO2 Oxygen Concentration: 21% (standard condition) – Oxygen concentration can affect sensitivity\u003c\/li\u003e\n\u003cli\u003eLoad Resistance: 20KΩ\u003c\/li\u003e\n\u003cli\u003eSensing Resistance Rs: 10KΩ – 60KΩ (1000ppm CH4)\u003c\/li\u003e\n\u003cli\u003ePreheat Time: Over 24 hours\u003c\/li\u003e\n\u003cli\u003eStandard Encapsulation: Bakelite, Metal cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePinout:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVCC: Powers the module, typically operating at +5V\u003c\/li\u003e\n\u003cli\u003eGND: Connects the module to system ground\u003c\/li\u003e\n\u003cli\u003eDigital Out (DO): Provides digital output based on set threshold value\u003c\/li\u003e\n\u003cli\u003eAnalog Out (AO): Outputs 0-5V analog voltage based on gas intensity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Leakage Detection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe MQ-4 Methane Gas Sensor is an essential component in gas leakage detection equipment for homes and industries, ensuring the safety of occupants and preventing potential hazards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Combustible Gas Detector:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith its reliable and accurate gas detection capabilities, this sensor is ideal for industrial settings where combustible gas detection is crucial for maintaining a safe working environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable Gas Detectors:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe compact and versatile design of the MQ-4 sensor makes it suitable for use in portable gas detectors, providing users with a portable and reliable solution for gas detection on the go.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eEnsure safety and peace of mind with the MQ-4 Methane Gas Sensor. Its advanced features, high sensitivity, and ease of use make it the perfect choice for various gas detection applications. Order yours today and experience reliable and efficient gas detection like never before.\u003c\/p\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265463941,"sku":"SN-000062-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-4.png?v=1767555020"},{"product_id":"mq-9-carbon-monoxide-flammable-gasses","title":"MQ-9 Carbon Monoxide, Flammable Gasses","description":"\u003cp data-mce-fragment=\"1\"\u003eThis is an easy to use sensor module you can use to sense the amount of contaminant in surrounding air, giving the reading of air quality index. This is a famous sensor module commonly used with Arduino to build smoke detectors, IoT environment monitoring and smart agricultural projects.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNote :\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eThis sensor works with both digital and analog mode. You can connect analog output (AO) to get the air quality index reading (conversion required), or you can connect the digital output (DO) to sense the threshold of air quality. Adjust the potentiometer (a.k.a. trimmer) to set the digital output (DO) sensitivity.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis gas sensor heating element is alternating between 1.4V and 5V.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSensitive to Gas\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCarbon Monoxide (CO)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFlammable gases\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCommon Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOperating voltage : 5V\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOutput type : DIGITAL and ANALOG\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePreheat duration : 20s\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAdjustable sensitivity via potentiometer\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eComes with LED indicators for POWER and OUTPUT\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFixed screw holes for easy installation\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eModel :\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eFC-22\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003ePinout and Wiring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2285\/0583\/files\/shopifypics_6_480x480.png?v=1707726969\" width=\"285\" height=\"204\"\u003e\u003c\/p\u003e\n\u003ctable data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eLabel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eMeaning\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eVCC\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003ePower source\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eConnect to 5V of system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eGND\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eGround\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eConnect to GND of system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eDO\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eDigital Output\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eConnect to digital IO pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eAO\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eAnalog Output\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eConnect to analog input pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCode\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"wp-block-heading\" id=\"htoc-hardware-components\"\u003e\u003cstrong\u003e\u003cspan id=\"Hardware_Components\"\u003eHardware Components\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will require the following hardware for Interfacing MQ-9 Gas Sensor with Arduino:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eS.no\u003c\/th\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eComponent\u003c\/th\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eValue\u003c\/th\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eQty\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1.\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eArduino\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eUNO\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e2.\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eGas Sensor\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eMQ9\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e3.\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eRed\u003cspan\u003e \u003c\/span\u003eLED\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e–\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e4.\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eResistor\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1KΩ\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e5.\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eBreadboard\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e–\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e6.\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eJumper Wires\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e–\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"wp-block-heading\" id=\"toc-step-4--build-simple-circuit-3\"\u003e\u003cstrong\u003e\u003cspan id=\"Schematic\"\u003eSchematic\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMake connections according to the circuit diagram given below.\u003cimg loading=\"lazy\" decoding=\"async\" width=\"409\" height=\"268\" src=\"https:\/\/www.circuits-diy.com\/wp-content\/uploads\/2022\/12\/MQ-9-Gas-Sensor-with-Arduino-Circuit-Schematic-1100x720.png\" alt=\"MQ-9 Gas Sensor with Arduino-Circuit-Schematic\" class=\"wp-image-81560\" srcset=\"https:\/\/www.circuits-diy.com\/wp-content\/uploads\/2022\/12\/MQ-9-Gas-Sensor-with-Arduino-Circuit-Schematic-1100x720.png 1100w, https:\/\/www.circuits-diy.com\/wp-content\/uploads\/2022\/12\/MQ-9-Gas-Sensor-with-Arduino-Circuit-Schematic-550x360.png 550w, https:\/\/www.circuits-diy.com\/wp-content\/uploads\/2022\/12\/MQ-9-Gas-Sensor-with-Arduino-Circuit-Schematic-768x503.png 768w, https:\/\/www.circuits-diy.com\/wp-content\/uploads\/2022\/12\/MQ-9-Gas-Sensor-with-Arduino-Circuit-Schematic.png 1233w\" sizes=\"(max-width: 1100px) 100vw, 1100px\" data-mce-src=\"https:\/\/www.circuits-diy.com\/wp-content\/uploads\/2022\/12\/MQ-9-Gas-Sensor-with-Arduino-Circuit-Schematic-1100x720.png\"\u003e\u003c\/p\u003e\n\u003ch4 class=\"wp-block-heading\"\u003e\u003cspan id=\"Wiring_Connections\"\u003eWiring \/ Connections\u003c\/span\u003e\u003c\/h4\u003e\n\u003ctable height=\"129\" style=\"width: 100.062%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 20.5681%;\"\u003eArduino\u003c\/th\u003e\n\u003cth style=\"width: 40.4017%;\"\u003eMQ9 Gas Sensor\u003c\/th\u003e\n\u003cth style=\"width: 38.3816%;\"\u003eLED\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5681%;\"\u003e5V\u003c\/td\u003e\n\u003ctd style=\"width: 40.4017%;\"\u003eVCC\u003c\/td\u003e\n\u003ctd style=\"width: 38.3816%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5681%;\"\u003eGND\u003c\/td\u003e\n\u003ctd style=\"width: 40.4017%;\"\u003eGND\u003c\/td\u003e\n\u003ctd style=\"width: 38.3816%;\"\u003e-ve with Resistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5681%;\"\u003eA0\u003c\/td\u003e\n\u003ctd style=\"width: 40.4017%;\"\u003eA0\u003c\/td\u003e\n\u003ctd style=\"width: 38.3816%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5681%;\"\u003eD8\u003c\/td\u003e\n\u003ctd style=\"width: 40.4017%;\"\u003eD0\u003c\/td\u003e\n\u003ctd style=\"width: 38.3816%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5681%;\"\u003eD2\u003c\/td\u003e\n\u003ctd style=\"width: 40.4017%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.3816%;\"\u003ePositive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265496709,"sku":"SN-000063-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-9.jpg?v=1767555021"},{"product_id":"mq-8-hydrogen-gas","title":"MQ-8 Hydrogen Gas","description":"\u003cp\u003eThe MQ8 Hydrogen Gas Sensor Module is designed for detecting hydrogen (H₂) concentrations in the air. It utilizes a gas-sensitive semiconductor sensor that provides high sensitivity to hydrogen with a fast response and recovery time. This module is widely used in hydrogen leak detection systems, industrial safety applications, and environmental monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh sensitivity to hydrogen (H₂)\u003c\/li\u003e\n\u003cli\u003eFast response and recovery time\u003c\/li\u003e\n\u003cli\u003eStable and long lifespan\u003c\/li\u003e\n\u003cli\u003eEasy to interface with microcontrollers and development boards\u003c\/li\u003e\n\u003cli\u003eAnalog output signal for easy integration\u003c\/li\u003e\n\u003cli\u003eLow power consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDetection Range: 100ppm to 10000ppm H₂\u003c\/li\u003e\n\u003cli\u003eSensitivity: ≥ 10mV\/ppm (H₂)\u003c\/li\u003e\n\u003cli\u003eHeating Voltage: 5V ± 0.2V (AC or DC)\u003c\/li\u003e\n\u003cli\u003eLoad Resistance: Adjustable\u003c\/li\u003e\n\u003cli\u003ePreheat Time: 24 hours\u003c\/li\u003e\n\u003cli\u003eResponse Time: ≤ 10 seconds\u003c\/li\u003e\n\u003cli\u003eRecovery Time: ≤ 30 seconds\u003c\/li\u003e\n\u003cli\u003eOperating Temperature Range: -20°C to +50°C\u003c\/li\u003e\n\u003cli\u003eOperating Humidity: ≤ 95% RH\u003c\/li\u003e\n\u003cli\u003ePower Consumption: ≤ 900mW\u003c\/li\u003e\n\u003cli\u003eDimensions: 32mm x 20mm x 22mm\u003c\/li\u003e\n\u003cli\u003eWeight: 5g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eGas Leak Detection Systems:\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eUsed in homes, offices, and industrial environments to detect hydrogen gas leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eIndustrial Safety:\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eEnsures safety in industrial settings by monitoring hydrogen levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eEnvironmental Monitoring:\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eApplied in systems that monitor air quality and hydrogen pollution levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eHydrogen Fuel Cells:\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eUsed to detect leaks and monitor hydrogen levels in fuel cell applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eSmart Home Devices:\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated into smart home safety systems for hydrogen gas detection.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265529477,"sku":"SN-000064-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-8.jpg?v=1767555022"},{"product_id":"mq-6-lpg-butane-gas","title":"MQ-6 - LPG, Butane Gas","description":"\u003cp\u003eMQ6 Propane Butane LPG LNG Gas Sensor Module utilizes an MQ-6 as the sensitive component and has a protection resistor and an adjustable resistor on board. The MQ-6 gas sensor is highly sensitive to LPG, iso-butane, propane and less sensitive to alcohol, cooking fume and cigarette smoke. It could be used in gas leakage detecting equipment’s in family and industry. The resistance of the sensitive component changes as the concentration of the target gas changes.\u003c\/p\u003e\n\u003cp\u003eSensitive material of MQ-6 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible gas exists, The sensor’s conductivity is higher along with the gas concentration rising. Please use simple electro circuit, Convert change of conductivity to the corresponding output signal of gas concentration.\u003c\/p\u003e\n\u003cp\u003eThis sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cstrong\u003eFeatures :\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood sensitivity to Combustible gas in a wide range\u003c\/li\u003e\n\u003cli\u003eHigh sensitivity to Propane, Butane, and LPG\u003c\/li\u003e\n\u003cli\u003eLong life and low cost\u003c\/li\u003e\n\u003cli\u003eSimple drive circuit\u003c\/li\u003e\n\u003cli\u003eAn indication of the signal output\u003c\/li\u003e\n\u003cli\u003eDual signal output (analog output, and TTL level output)\u003c\/li\u003e\n\u003cli\u003eThe TTL output signal is low. (When low output signal light, and can be connected directly to the microcontroller)\u003c\/li\u003e\n\u003cli\u003e0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage.\u003c\/li\u003e\n\u003cli\u003eHigh sensitivity to hydrogen.\u003c\/li\u003e\n\u003cli\u003eCan be resistant to ethanol steam, LPG (petroleum), smoke interference.\u003c\/li\u003e\n\u003cli\u003eHas a long life and reliable stability.\u003c\/li\u003e\n\u003cli\u003eFast response and recovery characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e\u003cstrong\u003eApplications :\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGas leak detection system\u003c\/li\u003e\n\u003cli\u003eFire\/Safety detection system\u003c\/li\u003e\n\u003cli\u003eDomestic gas leakage detector\u003c\/li\u003e\n\u003cli\u003eIndustrial Combustible gas detector\u003c\/li\u003e\n\u003cli\u003ePortable gas detector\u003c\/li\u003e\n\u003cli\u003eGas leak alarm\u003c\/li\u003e\n\u003cli\u003eGas detector\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265562245,"sku":"SN-000065-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-6.jpg?v=1767555023"},{"product_id":"mq-7-carbon-monoxide","title":"MQ-7 - Carbon Monoxide","description":"\u003cp\u003e\u003cspan\u003eThe MQ-7 gas sensor has high sensitivity to Carbon Monoxide. The sensor could be used to detect different gases contains CO, it is with low cost and suitable for different application.It is widely used in domestic CO gas leakage alarm, industrial CO gas alarm, and portable CO gas detector. It can be easily interfaced with Arduino or Raspberry Pi using a simple electronic circuit on a breadboard.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003eMQ-7 CO Carbon Monoxide Coal Gas Sensor Module detects the concentrations of CO in the air and outputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis module provides both digital and analog outputs. Threshold level for digital output can be easily adjusted using the preset on the board. MQ-7 sensor module can be easily interfaced with Micro-controllers, arduino and etc.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eOperating voltage : DC 5 V.\u003c\/li\u003e\n\u003cli\u003eIC driver : LM 393.\u003c\/li\u003e\n\u003cli\u003eSize : 11 x 33 x 20 mm.\u003c\/li\u003e\n\u003cli\u003eRange : 10 to 1000 ppmm.\u003c\/li\u003e\n\u003cli\u003eCharacteristic gas : 100 ppmm CO.\u003c\/li\u003e\n\u003cli\u003eSensitive resistance : 2 to 20 10kohm 10kohm at 100ppm CO.\u003c\/li\u003e\n\u003cli\u003eSensitivity : ≥ 3%.\u003c\/li\u003e\n\u003cli\u003eReturn time : ≤ 30 s.\u003c\/li\u003e\n\u003cli\u003eHeating resistance : ± 31ohm 3ohm.\u003c\/li\u003e\n\u003cli\u003eHeating current : ≤ 180 mA.\u003c\/li\u003e\n\u003cli\u003eReaction time : ≤ 1 s.\u003c\/li\u003e\n\u003cli\u003eHeating voltage : 5.0V ± 2V \/ 1.5 ± 1V.\u003c\/li\u003e\n\u003cli\u003eHeating power : approx. 350 mW.\u003c\/li\u003e\n\u003cli\u003eAmbient temperature : -20 ° C to + 50 ° C.\u003c\/li\u003e\n\u003cli\u003eHumidity : ≤ 95% RH.\u003c\/li\u003e\n\u003cli\u003eOxygen content : 21%.\u003c\/li\u003e\n\u003cli\u003eThe analog output voltage, the higher the concentration the higher the voltage.\u003c\/li\u003e\n\u003cli\u003eThe carbon monoxide detection with better sensitivity.\u003c\/li\u003e\n\u003cli\u003eThere are four screw holes for easy positioning;\u003c\/li\u003e\n\u003cli\u003eProduct Dimensions: 32 x 20 x 22 mm (LxWxH)\u003c\/li\u003e\n\u003cli\u003eWith a long service life and reliable stability\u003c\/li\u003e\n\u003cli\u003eRapid response and recovery characteristics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor home, carbon monoxide detection device environment. Suitable for carbon monoxide and gas detection.\u003c\/li\u003e\n\u003cli\u003eMQ-7 Gas Sensor ( detects carbon mono oxide )\n\u003cp\u003e\u003cspan\u003eThe MQ-7 gas sensor has high sensitivity to Carbon Monoxide. The sensor could be used to detect different gases contains CO, it is with low cost and suitable for different application.It is widely used in domestic CO gas leakage alarm, industrial CO gas alarm, and portable CO gas detector. It can be easily interfaced with Arduino or Raspberry Pi using a simple electronic circuit on a breadboard.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv\u003eMQ-7 CO Carbon Monoxide Coal Gas Sensor Module detects the concentrations of CO in the air and outputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv\u003eThis module provides both digital and analog outputs. Threshold level for digital output can be easily adjusted using the preset on the board. MQ-7 sensor module can be easily interfaced with Micro-controllers, arduino and etc.\u003c\/div\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265595013,"sku":"SN-000066-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/mq-7-gas-detection-module-carbon-monoxide.jpg?v=1767555024"},{"product_id":"mq-5-natural-gas-lpg","title":"MQ-5 - Natural gas, LPG","description":"\u003cp\u003eThe MQ-5 is used in gas leakage detecting equipment in consumer and industry applications, this sensor has high sensitivity in detecting LPG compared to MQ 2, It can also be used to detect natural gas, coal gas, avoid the noise of alcohol, cooking fumes, and cigarette smoke. The sensitivity can be adjusted by the potentiometer at the back of this sensor module.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower supply needs: 5V \u003c\/li\u003e\n\u003cli\u003eInterface type: Analog \u003c\/li\u003e\n\u003cli\u003ePin Definition: 1-Output 2-GND 3-VCC \u003c\/li\u003e\n\u003cli\u003eHigh sensitivity to LPG, natural gas, town gas Small sensitivity to alcohol, smoke Fast response Stable and long life Simple drive \u003c\/li\u003e\n\u003cli\u003ecircuit Size: 40x20mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh sensitivity to LPG, natural gas , town gas\u003c\/li\u003e\n\u003cli\u003eSmall sensitivity to alcohol, smoke.\u003c\/li\u003e\n\u003cli\u003eFast response\u003c\/li\u003e\n\u003cli\u003eStable and long life\u003c\/li\u003e\n\u003cli\u003eSimple drive circuit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePin Description:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0527\/2692\/3444\/files\/MQ5_-_LPG_Natural_Gas_Coal_Gas_Sensor_Module.jpg?v=1631787637\" alt=\"\" width=\"335\" height=\"213\"\u003e\u003c\/div\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGas leakage detector\u003c\/li\u003e\n\u003cli\u003eToys\u003c\/li\u003e\n\u003cli\u003eLiquefied petroleum gas, natural gas, coal gas monitoring device suitable for home or industrial.\u003c\/li\u003e\n\u003cli\u003eExcellent resistance to alcohol, smoke interference ability\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764265627781,"sku":"SN-000067-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-5.jpg?v=1767555026"},{"product_id":"mq-2-smoke-gas-sensor-module","title":"MQ-2 Smoke Gas LPG Butane Hydrogen Sensor Module","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eMQ2 Gas sensor\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a Metal Oxide Semiconductor (MOS) type Gas Sensor mainly used to detect gases like\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMethane\u003c\/strong\u003e,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eButane\u003c\/strong\u003e,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eLPG\u003c\/strong\u003e,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eSmoke\u003c\/strong\u003e, etc. It is also known as\u003cspan\u003e \u003c\/span\u003eChemiresistors\u003cspan\u003e \u003c\/span\u003eas the gas detection is based on the change of resistance of the sensing material when the Gas comes in to contact. If you want to measure a different type of Gas you can check these\u003cspan\u003e \u003c\/span\u003eGas Sensors. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMQ2 Gas sensor module\u003c\/strong\u003e works on 5V DC and uses around 800mW. It can detect LPG, Smoke, Alcohol, Propane, Hydrogen, Methane and Carbon Monoxide concentrations in a range of 200 to 10000 ppm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMQ2 Gas Sensor Features \u0026amp; Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Voltage is +5V\u003c\/li\u003e\n\u003cli\u003eAnalog output voltage: 0V to 5V\u003c\/li\u003e\n\u003cli\u003eDigital Output Voltage: 0V or 5V (TTL Logic)\u003c\/li\u003e\n\u003cli\u003ePreheat duration 20 seconds\u003c\/li\u003e\n\u003cli\u003eCan be used as a Digital or analog sensor\u003c\/li\u003e\n\u003cli\u003eThe Sensitivity of Digital pin can be varied using the potentiometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"tablescroll\"\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTo use the \u003cstrong\u003eMQ2 gas sensor module\u003c\/strong\u003e, you need to power the device with 5V supply and the Power LED will start to glow. You should give it some preheating time before start reading the output. While measuring the gas present, the Output LED will glow in a specific concentration of the gas. You can change it by using the potentiometer. Else you can also use the Analog Output to see how your program reacts to different concentration of gases present.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg height=\"337\" width=\"337\" alt=\"MQ2 Gas Sensor Pinout\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0300\/6424\/6919\/files\/MQ2_Gas_Sensor_600x600.jpg?v=1586598425\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0300\/6424\/6919\/files\/MQ2_Gas_Sensor_600x600.jpg?v=1586598425\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVCC:\u003c\/strong\u003e positive power supply (5V)\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGND:\u003c\/strong\u003e power supply is negative\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDO:\u003c\/strong\u003e TTL switching signal output\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAO: \u003c\/strong\u003eanalog signal output\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764267200645,"sku":"SN-000084-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-2.jpg?v=1767555137"},{"product_id":"mq-135-air-quality-sensor","title":"MQ-135 Air Quality Sensor","description":"\u003cp\u003eThe MQ-135 gas sensor senses gases like ammonia nitrogen, oxygen, alcohols, aromatic compounds, sulfide, and smoke.\u003cbr\u003eThe boost converter of the chip MQ-3 gas sensor is PT1301. The operating voltage of this gas sensor is from 2.5V to 5.0V. The MQ-3 gas sensor has a lower conductivity to clean the air as a gas sensing material. In the atmosphere, we can find polluting gases, but the conductivity of the gas sensor increases as the concentration of polluting gas increases. MQ-135 gas sensor can be implemented to detect the smoke, benzene, steam, and other harmful gases. It has the potential to detect different harmful gases. The MQ-135 gas sensor is a low co st to purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWide detecting scope\u003c\/li\u003e\n\u003cli\u003eFast response and High sensitivity\u003c\/li\u003e\n\u003cli\u003eStable and long life\u003c\/li\u003e\n\u003cli\u003eOperating Voltage is +5V\u003c\/li\u003e\n\u003cli\u003eDetect\/Measure NH3, NOx, alcohol, Benzene, smoke, CO2, etc.\u003c\/li\u003e\n\u003cli\u003eAnalog output voltage: 0V to 5V\u003c\/li\u003e\n\u003cli\u003eDigital output voltage: 0V or 5V (TTL Logic)\u003c\/li\u003e\n\u003cli\u003ePreheat duration 20 seconds\u003c\/li\u003e\n\u003cli\u003eCan be used as a Digital or analog sensor\u003c\/li\u003e\n\u003cli\u003eThe Sensitivity of Digital pin can be varied using the potentiometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0672\/9409\/files\/MQ-2-4_480x480.jpg?v=1618138243\" width=\"323\" height=\"190\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764279849093,"sku":"SN-000091-DVR","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MQ-135.jpg?v=1767555973"},{"product_id":"carbon-monoxide-alarm","title":"Carbon Monoxide Alarm","description":"\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eSafe sensor technology, clear alarm: The carbon monoxide alarm uses particularly sensitive sensors on an electrochemical basis. They continuously measure CO densities in the ambient air. If concentrations reach the corresponding limit values, CO detectors give a clear alarm. Usually, flashing LEDs then attract your attention.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eRobust sensor operation: The CO gas detector is made of durable and high quality electro-chemical high performance sensor, which is sensitive and durable. The operating temperature is 5¡ãC \/40¡ãC, and the suitable relative humidity is 20-90%.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eLCD display with indication of the CO concentration: You do not perceive carbon monoxide as a deadly respiratory poison with your natural senses. The LCD display allows you to read and monitor the CO concentration at any time and to avoid the occurrence of dangers.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eBattery operation: The CO detector uses replaceable batteries (2x1.5V AA). Even more conveniently, integrated power cells ensure many years of operation. A \"chirp\" every 30 seconds indicates that the battery is low and must be replaced\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40764302524549,"sku":"AL-000003-DVR","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/5258c32671b5ef9b53b6dccf900b4966.jpg?v=1767556912"},{"product_id":"9-in-1-mq-sensor-modules-kit","title":"9 in 1 MQ Sensor Modules Kit","description":"\u003cp\u003e\u003cspan class=\"a-text-bold\"\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eWith signal output indicator light.\u003c\/li\u003e\r\n\u003cli\u003eWorking voltage: DC 5V;\u003c\/li\u003e\r\n\u003cli\u003eWith signal output indicator light;\u003c\/li\u003e\r\n\u003cli\u003eThe dual signal output (analog output and TTL output);\u003c\/li\u003e\r\n\u003cli\u003eThe analog output and increased with the increase of concentration, the higher the concentration higher voltage;\u003c\/li\u003e\r\n\u003cli\u003eHas a very high sensitivity to sulfide, benzene vapor, smoke and other harmful gases;\u003c\/li\u003e\r\n\u003cli\u003eWith a long service life and reliable stability;\u003c\/li\u003e\r\n\u003cli\u003eQuick response and recovery characteristics;\u003c\/li\u003e\r\n\u003cli\u003eWith mounting holes, easy mounting;\u003c\/li\u003e\r\n\u003cli\u003eThe probe can be plug design, convenient test\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cspan class=\"a-text-bold\"\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003cbr\u003eFor harmful gas family, environment detection device, is suitable for the detection of the ammonia, aromatic compounds, sulfide, benzene vapor, smoke and other harmful gas, gas sensitive element concentration range: 10 to 1000ppm provides reference cases.\u003cbr\u003e\u003cspan class=\"a-text-bold\"\u003e\u003cbr\u003e\u003cstrong\u003ePackage List:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eMQ-2 Smoke Sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-3 Alcohol Sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-4 Methane Sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-5 LPG Natural Gas City Gas Sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-6 isobutane propane sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-7 Carbon Monoxide Sensor Module\u003c\/li\u003e\r\n\u003cli\u003eMQ-8 hydrogen sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-9 Carbon Monoxide Combustible Gas Sensor\u003c\/li\u003e\r\n\u003cli\u003eMQ-135 air quality detection sensor\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":40879487877253,"sku":"SN-000175-DVR","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/71c25e_wNjL._AC_SX679.jpg?v=1767557853"},{"product_id":"pm2-5-gp2y1014au0f-dust-smoke-particle-sensor","title":"PM2.5 GP2Y1014AU0F Dust Smoke Particle Sensor","description":"\u003cp\u003e\u003cspan\u003eThis PM2.5 GP2Y1010AU0F Dust Smoke Particle Sensor is an infrared emitting diode (IRED) and a phototransistor are diagonally arranged into this device. It detects the reflected light of dust in the air. Especially, it is effective to detect very fine particle like the cigarette smoke. In addition, it can distinguish smoke from house dust by the pulse pattern of the output voltage.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe module is mainly used for dust removal equipment alarm equipment, air purification equipment, dust robots, fire alarm, etc. industry equipment can detect smoke particles, pollen spores, and other particles.\u003c\/span\u003e\u003c\/p\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41068448481413,"sku":"SN-000141-DVR","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/pm.jpg?v=1767558230"},{"product_id":"mq131-ozone-gas-sensor-module","title":"MQ131 Ozone Gas Sensor Module","description":"\u003cp\u003e\u003cstrong\u003eMQ131 Ozone Gas Sensor Module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a compact and highly sensitive sensor designed for detecting ozone levels in the ambient air. It utilizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003etin dioxide (SnO2)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eas the sensing material, which has low conductivity in clean air but becomes more conductive in the presence of ozone. The module can detect ozone concentrations ranging from\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10-1000 ppb\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor low concentrations and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10ppm-1000ppm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor high concentrations. It features both\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eanalog output\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTTL level digital output\u003c\/strong\u003e, making it compatible with microcontroller-based systems for direct integration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWide Detection Range\u003c\/strong\u003e: Capable of detecting ozone concentrations from\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10PPB to 1000PPB\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(low concentration) and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10ppm to 1000ppm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(high concentration).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual Signal Output\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAnalog Output\u003c\/strong\u003e: Provides a voltage signal that varies with ozone concentration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTTL Level Digital Output\u003c\/strong\u003e: Can be directly connected to a microcontroller's I\/O port.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQuick Response and Recovery\u003c\/strong\u003e: The sensor quickly responds to changes in ozone levels and recovers to baseline values efficiently.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTrimmer Potentiometer\u003c\/strong\u003e: Allows setting of threshold levels for the digital output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLong Life and Low Cost\u003c\/strong\u003e: Built for durability with a long operational lifespan and cost-effective design.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLED Indicators\u003c\/strong\u003e: Equipped with LEDs that indicate signal outputs and sensor status.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSensing Material\u003c\/strong\u003e: Tin dioxide (SnO2)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDetection Range\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLow concentration:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10PPB to 1000PPB\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh concentration:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10ppm to 1000ppm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAnalog Output Voltage\u003c\/strong\u003e: 0-5V DC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Size\u003c\/strong\u003e: 30mm (L) x 20mm (W) x 28mm (H)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e: 10 grams\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e: Operates with a voltage range suitable for most microcontroller setups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePrecautions\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAvoid Water Condensation\u003c\/strong\u003e: Prolonged exposure to condensation can reduce sensor sensitivity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Gas Concentrations\u003c\/strong\u003e: Continuous exposure to high concentrations of gas can degrade sensor performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHarsh Environments\u003c\/strong\u003e: High humidity, temperature, or pollution can negatively impact the sensor's longevity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVibration\u003c\/strong\u003e: Avoid continuous vibration or shock to prevent sensor damage or disconnection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAir Quality Monitoring\u003c\/strong\u003e: Ideal for monitoring ozone levels in environmental and industrial settings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHome Safety Systems\u003c\/strong\u003e: Used in devices that detect ozone leaks and ensure air safety.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Equipment\u003c\/strong\u003e: Suitable for use in machinery that operates in ozone-sensitive environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084718645381,"sku":"SN-000162-DVR","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/a1eeaae4-bf17-4f9c-92ac-06907b58bdbe.jpg?v=1767558329"},{"product_id":"mq131-high-concentration-ozone-gas-sensor","title":"MQ131 High Concentration Ozone Gas Sensor","description":"\u003cp class=\"page_speed_1831963428\"\u003e\u003cspan class=\"page_speed_2104584835\"\u003e\u003cspan class=\"page_speed_1383992182\"\u003e\u003cstrong\u003eMQ-131 Ozone Gas Detector Sensor Module\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"page_speed_2143360580\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eMQ-131 Ozone Gas Detector Sensor Module The sensitive material of the MQ131 gas sensor is O3 SnO2, which with lower conductivity in clean air. When Ozone gas exists. The sensor’s conductivity is higher along with the gas concentration rising. Please use a simple electro circuit, Convert the change of conductivity to correspond output signal of gas concentration. MQ131 gas sensor has a high sensitivity to Ozone, also sensitive to O3 CL2, NO2, etc.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"page_speed_1831963428\"\u003e\u003cspan class=\"page_speed_2104584835\"\u003e\u003cspan class=\"page_speed_1383992182\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eFast response characteristics\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eMounting holes to facilitate fixed installation\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eThe probe can plug design for easy testing.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eSignal light indicates the output\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eDual signal output (analog output, and TTL-level output)\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eTTL output valid signal is low; (low output signal light, can be accessed by the microcontroller IO port)\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eAnalog output increases with the concentration, the higher the voltage the higher the concentration\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eThe ozone gas with high sensitivity (detection concentration range 10PPB-2PPM Ozone)\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\n\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eLong life and reliable stability\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"page_speed_1831963428\"\u003e\u003cspan class=\"page_speed_2104584835\"\u003e\u003cspan class=\"page_speed_1383992182\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eModel No.: MQ-131\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eSensor: MQ-131\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eDetecting Range: 10PPB-2PPM\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eWorking voltage: 5VDC\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eLength: 31 mm\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eWidth: 22 mm\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eHeight: 29 mm\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eWeight: 8 gm\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"page_speed_1358349901\"\u003e\u003cspan class=\"page_speed_428328170\"\u003e\u003cspan class=\"page_speed_1383992182\"\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eDomestic Ozone concentration overload Detector\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003eIndustrial Ozone concentration overload Detector\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"page_speed_1190716908\"\u003e\u003cspan class=\"page_speed_305952673\"\u003e\u003cspan class=\"page_speed_486659535\"\u003ePortable Ozone concentration overload Detector\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084720021637,"sku":"SN-000163-DVR","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/s-l1600-6-540x600.jpg?v=1767558330"},{"product_id":"mq136-hydrogen-sulfide-gas-sensor","title":"MQ136 Hydrogen Sulfide Gas Sensor","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1. Adopt high-quality double panel design, with power indication and TTL signal output indication;\u003cbr\u003e2. With DO switch signal (TTL) output and AO analog signal output;\u003cbr\u003e3. TTL output high and low level. (It can be directly connected to the single-chip microcomputer or relay module)\u003cbr\u003e4. The analog output voltage changes with the concentration.\u003cbr\u003e5. It has better sensitivity.\u003cbr\u003e6. There is a screw hole for easy positioning;\u003cbr\u003e7. Long-term service life and reliable stability\u003cbr\u003e8. Fast response and recovery characteristics\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInput voltage: DC5V Power consumption (current): 150mA\u003cbr\u003eDO output: TTL digital 0 And 1 (0.1 and 5V)\u003cbr\u003eAO output: analog level signal.\u003cbr\u003eSpecial reminder: After the sensor is powered on, it needs to be warmed up for about 20S, the measured data will be stable, and the sensor heating is normal, because there is a heating wire inside, if it is hot, it will not be normal NS.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eWiring mode:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1. VCC: connect to the positive pole of the power supply (5V)\u003cbr\u003e2. GND: connect to the negative pole of the power supply\u003cbr\u003e3. DO: TTL switch signal output\u003cbr\u003e4. AO: analog signal output\u003cbr\u003e5. Equipped with fixing bolt holes for easy installation\u003c\/p\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084721496197,"sku":"SN-000164-DVR","price":21.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/2024-03-23-65fea468bea08.jpg?v=1767558332"},{"product_id":"mq137-ammonia-gas-detection-sensor-module","title":"MQ137 Ammonia Gas Detection Sensor Module","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e1. Adopt high-quality double-panel design, with power supply and TTL signal output indications\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2. With DO switch signal (TTL) output and AO analog signal output\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3. TTL output high and low level. (Can be directly connected to the single chip or relay module)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e4. The analog output voltage changes with the concentration\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e5. There is a screw hole for easy positioning\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e6. Long-term service life and reliable stability\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e7. Fast response and recovery features\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eElectrical performance:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eInput voltage: DC5V Power consumption (current): 150mA\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eDO output: TTL digital quantity 0 and 1 (0.1 and 5V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eAO output: analog level signal\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eSpecial reminder\u003c\/strong\u003e:\u003cbr\u003eAfter the sensor is energized, it needs to preheat about 20S, the measured data is stable, the sensor heating is normal, because there are heating wires inside, if the hand is hot, it will be abnormal.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eWiring\u003c\/strong\u003e:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1. VCC: Connect to the positive pole of the power supply (5V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2. GND: Connect to the negative pole of the power supply\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3. DO: TTL switch signal output\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e4. AO: analog signal output\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-spm-anchor-id=\"2013.1.0.i7.41167a58IMSXOD\"\u003e\u003cspan\u003e5. There are fixing bolt holes for easy installation\u003c\/span\u003e\u003c\/div\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084723429509,"sku":"SN-000165-DVR","price":22.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/000_0c45325b-99d4-4ea0-a63b-9487a2d9777c.jpg?v=1767558333"},{"product_id":"mq138-formaldehyde-gas-sensor-module","title":"MQ138 Formaldehyde Gas Sensor Module","description":"\u003cp\u003ensitive material of MQ138 gas sensor is SnO2, which with lower conductivity in clean air. When VOC gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.\u003cbr\u003eMQ138 gas sensor has high sensitivity to toluene, acetone,alcohol,methanol,also can monitor hydrogen and other organic vapour well. It can detect kinds of organic gases and is a kind of low-cost sensor for kinds of applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cspan data-spm-anchor-id=\"a2g0o.detail.1000023.i0.40bejFTzjFTzA5\"\u003eWide range of applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eSmall appearance\u003c\/li\u003e\n\u003cli\u003eLong service life\u003c\/li\u003e\n\u003cli\u003eFast response time\u003c\/li\u003e\n\u003cli\u003eWith mounting holes for easy permanent installation\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDetection Gas: toluene, acetone, alcohol, hydrogen\u003c\/li\u003e\n\u003cli\u003eDetection Range: 5～500ppm VOC\u003c\/li\u003e\n\u003cli\u003eSize：32mm X22mm X27mm   L x W x G\u003c\/li\u003e\n\u003cli\u003eMain chip：LM393.\u003c\/li\u003e\n\u003cli\u003eOperating voltage: DC 5V\u003c\/li\u003e\n\u003cli\u003eHeating voltage: 5 ±0.2V (AC·DC)\u003c\/li\u003e\n\u003cli\u003eWorking current: 180mA.\u003c\/li\u003e\n\u003cli\u003eCircuit voltage: DC5V (Max DC 24V)\u003c\/li\u003e\n\u003cli\u003eLoad resistance: 10K (adjustable)\u003c\/li\u003e\n\u003cli\u003eTest concentration range :1-100ppm.\u003c\/li\u003e\n\u003cli\u003eClean air voltage: \u0026lt; 1.5V.\u003c\/li\u003e\n\u003cli\u003eSensitivity: \u0026gt; 3%\u003c\/li\u003e\n\u003cli\u003eResponse time: \u0026lt; 1S (3-5 minute warm-up, theory preheating time 48 hours)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084727230597,"sku":"SN-000166-DVR","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/8e9822d0b28aa8a964b926684eb3c7ca.jpg?v=1767558334"},{"product_id":"mq139-freon-gas-sensor-probe","title":"MQ139 Freon Gas Sensor Probe","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cspan\u003eWith signal output indicator light;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDual signal output (analog output and TTL level output);\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe TTL output valid signal is low level; (the signal light is on when the output low level, can be connected to the IO port of the microcontroller)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe analog output increases with the concentration, the higher the concentration, the higher the voltage;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh sensitivity to ozone gas (detection concentration range 10-1000ppm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIt has a long service life and reliable stability;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuick response and recovery features;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWith mounting holes, it is convenient for fixed installation;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe probe can be plugged and unplugged, which is convenient for testing.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eWide range of applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-spm-anchor-id=\"a2g0o.detail.1000023.i0.65c0Ynv5Ynv5QL\"\u003eWith signal output indicator light\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWith mounting holes for easy fixed installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh sensitivity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLong service life\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions: 35mm X21mm X28mm length X width X height\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084728803461,"sku":"SN-000167-DVR","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/139.jpg?v=1767558335"},{"product_id":"mg811-air-carbon-dioxide-co2-sensor-module","title":"MG811 Air Carbon Dioxide (CO2) Sensor Module","description":"\u003cp\u003eThis text describes a carbon dioxide sensor module that employs infrared (IR) radiation to detect CO2 levels in the air. It’s ideal for projects needing a broad range of CO2 detection, such as monitoring indoor air quality, landfills, process control, and horticulture in controlled environments.\u003c\/p\u003e\n\u003cp\u003eThe module features an MG-811 sensor, a metal oxide sensor that requires heating to a specific temperature. This heating causes CO2 molecules to disengage from the air and be absorbed by the sensor. The MG-811 is more responsive to CO2 than to alcohol or CO, and its output voltage rises with increasing CO2 levels.\u003c\/p\u003e\n\u003cp\u003eSuitable for use in greenhouses and medical applications, the sensor module emits an analog signal that inversely correlates with CO2 concentration. It also provides a digital output pin with TTL output. The integrated potentiometer allows for the adjustment of the digital output threshold. Upon reaching this threshold, the sensor’s LED will activate, and the digital pin will emit a HIGH voltage signal.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003ePinout:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eVCC: 6V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(You can use a 4 AA battery holder for this ).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAOUT: Analog Output\u003c\/strong\u003e (voltage decreases as CO2 Levels increase).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDOUT: Digital Output that goes HIGH when the threshold is reached\u003c\/strong\u003e (set the threshold by turning the onboard potentiometer).\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGND: 0V.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eWide detecting scope.\u003c\/li\u003e\n\u003cli\u003eHigh sensitivity \u0026amp; stability.\u003c\/li\u003e\n\u003cli\u003eSimple drive circuit.\u003c\/li\u003e\n\u003cli\u003eDigital output: Active low (When it outputs a low-level signal, the indicator LED will be on)\u003c\/li\u003e\n\u003cli\u003eAnalog output: Two Range Options: 0 to 2V or 0V to 4V. The default is 0V to 2V DC.\u003c\/li\u003e\n\u003cli\u003eCompatible with Arduino \u0026amp; Raspberry Pi (for use on analog output with Raspberry Pi you will need an Analog to Digital Converter Chip).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications: \u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"woocommerce-product-attributes shop_attributes\" height=\"183\" style=\"width: 100%; height: 157.75px;\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_model\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eModel\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003eMG811\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_operating-voltage-v\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eOperating Voltage (V)\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003e6V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_characteristic-gas\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eCharacteristic Gas\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003eCO2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_detection-zone\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eDetection Zone\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003e0 – 10000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_length-mm\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eLength (mm):\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_width-mm\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eWidth (mm):\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_height\" style=\"height: 20.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 20.5938px;\"\u003eHeight (mm):\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 20.5938px;\"\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_weight-g\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\" style=\"width: 58.9843%; height: 19.5938px;\"\u003eWeight (g):\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\" style=\"width: 38.096%; height: 19.5938px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084734111877,"sku":"SN-000168-DVR","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/811.jpg?v=1767558336"},{"product_id":"tgs813-gas-sensor-module","title":"TGS813 Gas Sensor Module","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdopt high-quality double-panel design, with power indication and TTL signal output indication;\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWith DO switch signal (TTL) output and AO analog signal output;\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTTL output high and low level. (It can be directly connected to the single-chip microcomputer or the relay module)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe analog output voltage changes with the concentration.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIt has good sensitivity to liquefied gas, natural gas, city gas and smog.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThere is a screw hole for easy positioning;\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLong-term service life and reliable stability\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFast response and recovery characteristics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical performance:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput voltage: DC5V Power consumption (current): 150mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDO output: TTL digital 0 And 1 (0.1 and 5V)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAO output: analog level signal.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpecial reminder: After the sensor is powered on, it needs to be warmed up for about 20S, the measured data is stable, and the sensor heats up. It is normal because there is a heating wire inside. Up.\u003c\/li\u003e\n\u003cli\u003eSize : 34.2mm*20.2mm*22.6mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMain chip : LM393, TGS813 gas sensors\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorking voltage : DC5V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWiring mode:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eVCC: connect to the positive pole of the power supply (5V)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGND: connect to the negative pole of the power supply\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDO: TTL switch signal output\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAO: analog signal output\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEquipped with fixing bolt holes for easy installation\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41084735651973,"sku":"SN-000169-DVR","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/61swiWPvt3L._AC_SX679.jpg?v=1767558338"},{"product_id":"ms-1100-voc-gas-sensor","title":"MS-1100 VOC Gas Sensor","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMS-1100 sensor is mainly used to detect VOC gas such as formaldehyde, toluene, benzene, etc.\u003c\/li\u003e\n\u003cli\u003eIt is a semiconductor type sensor product, which is widely used in ventilation equipment, ventilating fan, air filter, hood and other equipment.\u003c\/li\u003e\n\u003cli\u003eIt has extremely high sensitivity and stability, and can detect gases above 0.1ppm.\u003c\/li\u003e\n\u003cli\u003eIt is suitable for detecting various organic volatile components such as formaldehyde, benzene, xylene, etc. in the air.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eThe heating voltage:5V+\/-2%\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorking current:100mA (max)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe circuit voltage: 4.Sensitivity:\u0026gt;3%\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eResponse time:\u0026lt;5s (preheat 3-5 minutes)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eResponse time:\u0026gt;10s\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe component power consumption: =\u0026lt;430mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorking temperature:-10~60 celsius (nominal temperature 20 celsius)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHumidity:90%RH (nominal humidity 65%RH)\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41189994594437,"sku":"SN-000199-DVR","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/MS1100.jpg?v=1767558846"},{"product_id":"gy-sgp41-tvoc-co2-air-quality-gas-sensor-module","title":"GY-SGP41 TVOC\/CO2 Air Quality Gas Sensor Module","description":"\u003cp\u003eSGP41 VOC and NOX sensors (for intelligent air handling equipment)\u003cbr\u003eSGP4 is a VOC (volatile organic compounds) and NOx (nitrogen oxides) sensor designed as a digital intelligent switch and regulating unit that can be applied to air treatment equipment such as purifiers. Powerful gas index algorithm, the two sensor signals are processed by the algorithm and can directly trigger the air processing equipment without user involvement. Therefore, this sensor solution is highly suitable for continuous monitoring of VOC and NOx (including potentially harmful environments that humans cannot detect). In addition, the air handling equipment based on SGP41 signal has automatic control function. Once VOC and\/or NOx issues are addressed, the equipment will shut down, which helps to save energy. The multi pixel sensing element of SGP41 has unparalleled reliability, long-term stability, and low drift in response to polluted gases in real-life environments.\u003c\/p\u003e\n\u003cp data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\u003cstrong\u003eParameters:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003ePower supply voltage: DC3.3v-5v\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003eCommunication interface: I2C\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003ePower consumption: 40mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003eProduct size: 13mm * 10.5mm\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\n\u003cspan\u003eThe product is compact and easy to carry\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\n\u003cspan\u003eLow consumption, power supply compatible with 3.3V-5V\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\n\u003cspan\u003eDigital output signal I2C interface\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\n\u003cspan\u003eMOx based gas sensor for air quality applications\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-spm-anchor-id=\"a2g0o.detail.1000023.i0.1d42KBWsKBWsF7\"\u003e\u003cspan\u003eWide range of use: can be applied to air handling equipment (such as purifiers), air exchange devices, kitchen range hoods, and on-demand controlled ventilation systems\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41200595533957,"sku":"SN-000206-DVR","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/3_05b930ed-ad69-436d-b8f2-f4e7e0c82753.jpg?v=1767558981"},{"product_id":"ens160-aht21-carbon-dioxide-air-quality-monitoring-temperature-humidity-sensor","title":"ENS160 AHT21 Carbon Dioxide Air Quality Monitoring Temperature Humidity Sensor","description":"\u003cp\u003e\u003cspan\u003eENS160 is a digital multi gas sensor specially designed for indoor air quality monitoring. It can best detect a variety of gases and volatile organic compounds (VOCs), including toluene, hydrogen, ethanol, NO2 and ozone. The air quality sensor is used for home and building automation, consumer goods, electrical appliances and air purification.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e:\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cspan\u003eDetection of reducing (VOC) and oxidizing gases (such as NO2)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMOX supports up to 4 independent gas sensors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegrated sensor measurement and heater drive control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegrated pre calibrated sensor fusion and automatic baseline correction algorithm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMultiple IAQ outputs (TVOC, ec02, AQL)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan\u003eSpecifications:\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e12C and SPI interface\u003c\/li\u003e\n\u003cli\u003e\u0026lt;1 minute warm-up\u003c\/li\u003e\n\u003cli\u003e\u0026lt;1 hour start\u003c\/li\u003e\n\u003cli\u003eAmbient - 40 to +85°C\/5 to 95% RH\u003c\/li\u003e\n\u003cli\u003eVDD1. 71 to 1.98v\u003c\/li\u003e\n\u003cli\u003eHigh resistance to siloxane and humidity\u003c\/li\u003e\n\u003cli\u003eEase of use. Selection of multi standard air quality signal\u003c\/li\u003e\n\u003cli\u003eEasy integration. No software library is required, which has no impact\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower supply voltage: 3.3VDC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorking temperature: -40 ~ +85°C\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOperating humidity: 5 ~ 95% RH\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConnection Mode:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eINT\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eADD\/MISO\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSDA\/MOSI\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSCL\/SCKLK\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGND\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e3V3\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVIN\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eConnection strip pitch:\u003c\/strong\u003e 2.54mm\u003c\/p\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41200595927173,"sku":"SN-000207-DVR","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/ENS160.jpg?v=1767558983"},{"product_id":"ccs811-air-quality-sensor","title":"CCS811 Air Quality Sensor","description":"\u003cp\u003eThe CCS811 module is a digital gas sensor with metal oxide (MOX) gas sensor to measure \"Volatile Organic Compounds\" (VOCs) from the air.\u003cbr\u003eThis sensor is intended for indoor use in combination with a microcontroller via an I2C interface. The sensor can also measure \" equivalent CO2\" (eCO2).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVoltage: 1.8 - 3.3V DC (3.3V recommended)\u003c\/li\u003e\n\u003cli\u003eCurrent (continuous in mode 1): 30mA\u003c\/li\u003e\n\u003cli\u003ePower (sleep mode): 19hA (at 1.8V)\u003c\/li\u003e\n\u003cli\u003eCurrent (peak): 54mA\u003c\/li\u003e\n\u003cli\u003eTemperature range (operation): -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eHumidity range (operation): 10 - 95%   \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41200602841221,"sku":"SN-000208-DVR","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/CCS811.jpg?v=1767558987"},{"product_id":"gy-sgp30-air-quality-gas-sensor","title":"GY- SGP30 Air Quality Gas Sensor","description":"\u003cp\u003eSGP30 Multi-Pixel Gas Sensor, a fully integrated MOX gas sensor. This is a very fine air quality sensor from the sensor experts, with I2C interfacing and fully calibrated output signals with a typical accuracy of 15% within measured values. The SGP combines multiple metal-oxide sensing elements on one chip to provide more detailed air quality signals.\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003eThis is a gas sensor that can detect a wide range of Volatile Organic Compounds (VOCs) and H2 and is intended for indoor air quality monitoring. When connected to your microcontroller (running our library code) it will return a Total Volatile Organic Compound (TVOC) reading and an equivalent carbon dioxide reading (eCO2) over I2C.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe SGP30 has a 'standard' hot-plate MOX sensor, as well as a small microcontroller that controls power to the plate, reads the analog voltage, tracks the baseline calibration, calculates TVOC and eCO2 values, and provides an I2C interface to read from. Unlike the CCS811, this sensor does not require I2C clock stretching.\u003c\/p\u003e\n\u003cp\u003eThis part will measure \u003cstrong\u003eeCO2\u003c\/strong\u003e (equivalent calculated carbon-dioxide) concentration within a range of 400 to 60,000 parts per million (ppm), and \u003cstrong\u003eTVOC\u003c\/strong\u003e (Total Volatile Organic Compound) concentration within a range of 0 to 60,000 parts per billion (ppb).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note, this sensor, like all VOC\/gas sensors, has variability and to get precise measurements you will want to calibrate it against known sources!\u003c\/strong\u003e That said, for general environmental sensors, it will give you a good idea of trends and comparison. The SGP30 does have built in calibration capabilities, note that eCO2 is calculated based on H2 concentration, it is not a 'true' CO2 sensor for laboratory use.\u003c\/p\u003e\n\u003cp\u003eAnother nice element to this sensor is the ability to set humidity compensation for better accuracy. An external humidity sensor is required and then the RH% is written over I2C to the sensor, so it can better calculate the TVOC\/eCO2 values.\u003c\/p\u003e\n\u003cp\u003eFor your convenience we've pick-and-placed the sensor on a PCB with a 1.8V regulator and some level shifting so it can be easily used with your favorite 3.3V or 5V microcontroller.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical details:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eUses I2C address 0x58\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Dimensions: 17.9 x 17.9 x 2.9 mm \/ 0.7\" x 0.7\" x 0.1\"\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41200616603781,"sku":"SN-000209-DVR","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/GY-SGP30.jpg?v=1767558988"},{"product_id":"fermion-bme688-ai-environmental-sensor-voc-temperature-humidity-pressure","title":"Fermion: BME688 AI Environmental Sensor (VOC, Temperature, Humidity, Pressure)","description":"\u003cdiv class=\"content Introduction\" id=\"Introduction\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eAI-Driven Gas Analysis\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe BME688 AI Environmental sensor supports advanced AI gas detection through\u003cspan\u003e \u003c\/span\u003eBosch’s BME AI-Studio\u003cspan\u003e \u003c\/span\u003ead\u003cspan\u003e \u003c\/span\u003eBSEC2-Arduino library, enabling users to train custom models for specific gas profiles. Unlike the BME680, it serves as a direct data source for AI algorithms, ideal for air quality systems, industrial leak detection, and environmental studies.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"226\" width=\"273\" data-merlin-processed=\"true\" title=\"BME688 AI Gas Analysis\" alt=\"BME688 AI Gas Analysis\" src=\"https:\/\/dfimg.dfrobot.com\/enshop\/20240920\/SEN0617-AI%20Gas%20Data%20Analysis.jpg\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHighly Accurate Environmental Sensing\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe BME688 AI Environmental sensor enhances the precision of temperature measurements, boasting an accuracy of ±0.5°C. These improvements render the sensor ideal for applications requiring highly accurate environmental data, including scientific experiments, climate research, and industrial environmental monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAdvanced Air Quality Monitoring\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe BME688 AI Environmental sensor excels in indoor air quality monitoring, detecting harmful VOCs and providing real-time data for smart homes. Its built-in heating layer ensures stable, accurate measurements by minimizing ambient interference.\u003c\/p\u003e\n\u003cp\u003e\u003cimg data-merlin-processed=\"true\" title=\"IAQ(Indoor Air Quality) Comparison Table\" alt=\"IAQ(Indoor Air Quality) Comparison Table\" src=\"https:\/\/dfimg.dfrobot.com\/enshop\/image\/data\/SEN0617\/SEN0617-sensor%20data.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"content Applications\" id=\"Applications\"\u003e\n\u003ch4\u003eApplications\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eIndoor Air Quality Measurement: Detect VOCs and monitor air quality in homes and offices.\u003c\/li\u003e\n\u003cli\u003eWeather Station: Provide accurate temperature, humidity, and pressure data for meteorological applications.\u003c\/li\u003e\n\u003cli\u003eIoT: Integrate into smart devices for environmental monitoring.\u003c\/li\u003e\n\u003cli\u003eGas Leak Detection: Identify hazardous gas leaks in industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"content Specification\" id=\"Specification\"\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOperating voltage: 3.3–5V DC (SPI only support 3.3V)\u003c\/li\u003e\n\u003cli\u003eOperating current: 5mA (25mA when VOC measurement is enabled)\u003c\/li\u003e\n\u003cli\u003eOutput signal I2C\/SPI Temperature Measurement Range: -40~+85°C\u003c\/li\u003e\n\u003cli\u003eTemperature measurement accuracy: ±0.5℃ (0–65℃)\u003c\/li\u003e\n\u003cli\u003eHumidity measurement range: 0-100% R.H.\u003c\/li\u003e\n\u003cli\u003eHumidity measurement accuracy: ±3% R.H. (20-80% R.H. @ 25°C)\u003c\/li\u003e\n\u003cli\u003eBarometric pressure measurement range: 300-1100hPa\u003c\/li\u003e\n\u003cli\u003eBarometric pressure measurement accuracy: ±0.6hPa (300-1100hPa@0~65℃)\u003c\/li\u003e\n\u003cli\u003eModule size: 18×15.6 mm\/0.71x0.61 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":41231773597829,"sku":"SN-000007-DFR","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/BME688soldering.png?v=1767559208"},{"product_id":"gravity-analog-electrochemical-co2-sensor-0-10000-ppm","title":"Gravity: Analog Electrochemical CO2 Sensor (0-10000 ppm)","description":"\u003cp\u003eThe Gravity: Analog Electrochemical CO2 Sensor is a module designed for detecting high concentrations of carbon dioxide and triggering an automated response. Based on the proven MG-811 sensor core, its primary function is to act as a simple, threshold-based switch. An onboard potentiometer allows for the manual setting of a specific CO₂ concentration level. When the ambient CO₂ exceeds this preset point, the sensor provides a clear digital signal, making it straightforward to implement event-driven systems like safety alarms or ventilation controls. With a wide detection range of up to 10,000 ppm, it is well-suited for monitoring environments where CO₂ can accumulate to significant levels, such as fermentation chambers or mushroom cultivation tents.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSimple Threshold Alarm for High-CO₂ Events\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe CO2 detection module's core feature is its function as a simple comparator. By adjusting the onboard potentiometer, a user can define the exact CO₂ level that triggers an alert. When this threshold is crossed, the digital output (DO) pin changes state, providing an unambiguous \"go\/no-go\" signal. This allows for the creation of simple logic-based systems (e.g., IF CO₂ level is high, THEN activate relay) without needing complex code to interpret analog data.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWide Detection Range for Specialized Environments\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eEngineered to perform in environments far beyond typical room air, this sensor can detect CO₂ concentrations up to 10,000 ppm. This capability makes it a practical tool for specific applications where high CO₂ is a key process variable. It enables reliable monitoring for projects such as triggering ventilation in a mushroom farm, creating a safety alert for wine or beer fermentation vessels, or monitoring small-scale bioreactors.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFlexible Dual Analog \u0026amp; Digital Outputs\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe CO₂ detection sensor provides both analog and digital outputs for enhanced flexibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDigital Output: Ideal for simple, immediate alarm systems. This signal can directly drive a relay, buzzer, or indicator LED, serving as a reliable trigger.\u003c\/li\u003e\n\u003cli\u003eAnalog Output: For more advanced applications, the analog output provides a voltage that correlates to the CO₂ concentration. This allows for data logging to observe trends over time. Note that electrochemical sensors require a stable temperature and humidity environment for best results and are better suited for observing relative changes rather than providing precise, calibrated ppm measurements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eChoosing the Right CO₂ Sensor?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eWith different technologies like NDIR, Electrochemical, and Photoacoustic, selecting the perfect sensor can be complex. The comprehensive guide breaks down the key differences and recommends the best sensor for 5 common project scenarios.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.dfrobot.com\/blog-1487.html\" target=\"_blank\"\u003e\u003cstrong\u003e» Read the Full 2025 CO₂ Sensor Selection Guide\u003c\/strong\u003e\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv id=\"Applications\" class=\"content Applications\"\u003e\n\u003ch4\u003eApplications:\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eFermentation Process Control: Monitor CO2 levels in brewing or other fermentation processes to trigger ventilation when concentrations become too high.\u003c\/li\u003e\n\u003cli\u003eMushroom Cultivation: Ensure optimal growing conditions by alerting when CO2 levels exceed the desired threshold.\u003c\/li\u003e\n\u003cli\u003eBasic Air Quality Alerts: A simple solution to detect poor ventilation in enclosed spaces like garages or basements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb data-v-1ff015f2=\"\"\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLarge Range\u003c\/li\u003e\n\u003cli\u003eAdjustable Alarm Threshold\u003c\/li\u003e\n\u003cli\u003eFast Response\u003c\/li\u003e\n\u003cli\u003eAnalog Output\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"Specification\" class=\"content Specification\"\u003e\n\u003ch4\u003eSpecifications:\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Voltage: \u003cspan\u003e3.7～5V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput:\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eGravity: Analog (Analog2.7～4.1V) + 3P Header \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDigital Output(Alarm):0～VCC Level\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eInterface: Gravity Analog\u003c\/li\u003e\n\u003cli\u003eMeasurement Principle: \u003cspan\u003eElectrochemistry (Solid electrolyte battery principle)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: \u003cspan\u003e0～10000 ppm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv data-v-1ff015f2=\"\" class=\"cell product-table-head\"\u003eResponse Time: \u003cspan\u003e\u0026lt;20s\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003eAverage Power: \u003cspan\u003e\u0026lt;1W\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eOnboard Circuitry: Heating Circuit, Signal Amplifier\u003c\/li\u003e\n\u003cli\u003ePCB Process: Immersion Gold\u003c\/li\u003e\n\u003cli\u003eOperation Temperature: \u003cspan\u003e-20℃～50℃\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eOperation Humidity: \u003cspan\u003e0～95% RH (No condensation)\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eDimensions: 32x42mm (1.26x1.65\")\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"Documents\" class=\"content documents\"\u003e\n\u003ch4\u003eDocuments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/wiki.dfrobot.com\/sen0159\/\" target=\"_blank\"\u003eProduct Wiki\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":41623341269125,"sku":"SN-000236-DFR","price":54.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/3_02697125-6906-42a6-ada7-54d1266be6cb.png?v=1778235311"},{"product_id":"gravity-pwm-ndir-infrared-carbon-dioxide-co2-sensor-400-5000-ppm","title":"Gravity: PWM NDIR Infrared Carbon Dioxide \/ CO2 Sensor (400-5000 ppm)","description":"\u003cp\u003eThe Gravity: PWM Infrared CO2 Sensor is a high-precision module engineered for quantitative measurement of carbon dioxide. It operates on the principle of Non-Dispersive Infrared (NDIR) technology to deliver stable, selective, and accurate data. The sensor's key features—high accuracy, exceptional stability, and a long service life—are backed by concrete performance metrics. With a standard indoor air quality detection range of\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e400 to 5000 ppm\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eand a fine\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eresolution of 1 ppm\u003c\/b\u003e, it is the definitive choice for data-driven applications such as IAQ monitoring, smart HVAC systems, and scientific research.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh-Accuracy NDIR Technology\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThis CO2 Sensor provides precise, quantitative readings, not just estimates. The\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/NDIR\" target=\"_blank\"\u003eNDIR technology\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003etargets the specific absorption wavelength of CO2, ensuring high selectivity. This performance is quantified by its specifications: an accuracy of ±(50ppm + 5% of reading) and a resolution of 1 ppm. The data is reliably transmitted via a PWM output signal, providing trustworthy data for analysis and control systems.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExceptional Long-Term Stability\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for continuous and reliable monitoring, this NDIR CO2 sensor maintains its performance across a wide range of real-world conditions. It operates consistently in temperatures from -10℃ to 50℃ and in humidity levels up to 95% RH (non-condensing). Featuring built-in temperature compensation and a swift\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eresponse time (T90 \u0026lt; 120s)\u003c\/b\u003e, it exhibits minimal signal drift, reducing the need for frequent recalibration in long-term, unattended deployments.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExtended 5-Year Service Life\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe robust NDIR sensor element is engineered for longevity, contributing to a service life of up to five years under normal operating conditions. This reliability is supported by an efficient electronic design, with an average current draw of just 40mA at 5V. This extended lifespan offers a lower total cost of ownership and greater peace of mind for permanent installations like smart home devices or building automation systems.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eChoosing the Right CO₂ Sensor?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eWith different technologies like NDIR, Electrochemical, and Photoacoustic, selecting the perfect sensor can be complex. The comprehensive guide breaks down the key differences and recommends the best sensor for 5 common project scenarios.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.dfrobot.com\/blog-1487.html\" target=\"_blank\"\u003e\u003cstrong\u003e» Read the Full 2025 CO₂ Sensor Selection Guide\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch4\u003eApplications\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eIndoor Air Quality (IAQ) Monitoring: Build a device to accurately track CO2 levels in homes, offices, or classrooms to manage ventilation and improve health and productivity.\u003c\/li\u003e\n\u003cli\u003eSmart Home \u0026amp; HVAC Systems: Integrate with HVAC systems to automatically introduce fresh air when CO2 levels rise, creating a smarter and more efficient climate control system.\u003c\/li\u003e\n\u003cli\u003eScientific \u0026amp; Agricultural Tech: Use in labs, greenhouses, or other controlled environments where precise CO2 concentration data is crucial for research or optimizing plant growth.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb data-v-1ff015f2=\"\"\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eHigh Accuracy\u003c\/li\u003e\n\u003cli\u003eLarge Range\u003c\/li\u003e\n\u003cli\u003eLong Lifespan\u003c\/li\u003e\n\u003cli\u003eAuto Temperature Compensation\u003c\/li\u003e\n\u003cli\u003eWater Vapor Interference Resistance\u003c\/li\u003e\n\u003cli\u003e3.3V UART Output\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDetection Gas: Carbon Dioxide (CO2)\u003c\/li\u003e\n\u003cli\u003eOperation Voltage: \u003cspan\u003e4.5～5.5V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower Supply: 5.0±0.1V DC\u003c\/li\u003e\n\u003cli\u003eAverage Current: 40mA@5V\u003c\/li\u003e\n\u003cli\u003eAverage Power: \u003cspan\u003e\u0026lt;430mW@5V\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput Signal: PWM\u003c\/li\u003e\n\u003cli\u003eOutput: \u003cspan\u003eGravity: UART (0～3.3V Level)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMeasurement Principle: \u003cspan\u003eNDIR (non-dispersive infrared) \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eDetection Range: 400～5000 ppm\u003c\/li\u003e\n\u003cli\u003eResolution: 1ppm\u003c\/li\u003e\n\u003cli\u003eAccuracy: \u003cspan\u003e±(100ppm + 6% readings)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eResponse Time: T90 \u0026lt; 120s\u003c\/li\u003e\n\u003cli\u003eWorking Temperature: \u003cspan\u003e0℃～50℃\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorking Humidity: 0～95%RH (non-condensing)\u003c\/li\u003e\n\u003cli\u003eDimensions: 69×37mm \/ 2.72×1.46\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":41623414210693,"sku":"SN-000237-DFR","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/1_b540a8c3-d81a-4762-aecd-ebbc22f5d74b.png?v=1778239009"},{"product_id":"gravity-i2c-scd41-infrared-carbon-dioxide-co2-sensor-400-5000-ppm","title":"Gravity: I2C SCD41 Infrared Carbon Dioxide \/ CO2 Sensor (400 - 5000 ppm)","description":"\u003cp\u003eCO2 is a key factor for indoor air quality as high levels compromise human cognitive performance and well-being.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThis Gravity: SCD41 CO2 sensor is based on the SCD41 miniature CO2 sensor from Sensirion.\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eSCD41 builds on the photoacoustic NDIR sensing principle and Sensirion’s patented PAsens® and CMOSens® technology to offer high accuracy at an unmatched price and the smallest form factor. On-chip signal compensation is realized with the built-in temperature and humidity sensor, while temperature and humidity data outputs are also available.\u003c\/p\u003e\n\u003cp\u003eSCD41 sensor detects the amount of energy that is absorbed by CO2 molecules. When pulsing the infrared emitter, CO2 molecules absorb infrared light periodically. This causes additional molecular vibration resulting in a pressure wave inside the measurement chamber. The higher the CO2 concentration, the more light is absorbed, and thus the greater the amplitude of this acoustic wave becomes. A microphone inside the gas chamber measures this, from which the CO2 concentration can then be calculated.\u003c\/p\u003e\n\u003cp\u003eClick to learn more about\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/sensirion.com\/products\/technology\/\" target=\"_blank\"\u003ePAsens® technology\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eClick to learn more about\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/img.dfrobot.com.cn\/wiki\/5d57611a3416442fa39bffca\/477b737333d4d828abac9323e8bf1eb2.pdf\" target=\"_blank\"\u003eNDIR sensors\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/dfimg.dfrobot.com\/enshop\/image\/cache3\/data\/SEN0536\/1_0x0.jpg.webp\" alt=\"Gravity: SCD41 Infrared CO2 Sensor - I2C\" title=\"Gravity: SCD41 Infrared CO2 Sensor - I2C\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eFeatures:\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCO2, temperature, and humidity, three in one\u003c\/li\u003e\n\u003cli\u003eSmall size of 32*27*8mm\u003c\/li\u003e\n\u003cli\u003eLow power, average current＜4mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eApplications:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIndoor CO2 concentration monitoring\u003c\/li\u003e\n\u003cli\u003eAmbient monitoring in greenhouse\u003c\/li\u003e\n\u003cli\u003eSmart ventilation systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply: 3.3V to 5V\u003c\/li\u003e\n\u003cli\u003eAverage Operating Current: ＜4mA\u003c\/li\u003e\n\u003cli\u003eI2C Address: 0x62\u003c\/li\u003e\n\u003cli\u003eProduct Size: 32*27*8mm\/1.26×1.06×0.31\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eCO2:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAccuracy: ±(40 ppm + 5% MV)\u003c\/li\u003e\n\u003cli\u003eMeasuring Range: 400 - 5000 ppm\u003c\/li\u003e\n\u003cli\u003eResponse Time: 60s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eHumidity:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTypical Relative Humidity Accuracy: 6%RH\u003c\/li\u003e\n\u003cli\u003eRelative Humidity Measuring Range: 0 to 95%RH\u003c\/li\u003e\n\u003cli\u003eResponse Time: 120s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eTemperature:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTypical Temperature Accuracy: 0.8℃\u003c\/li\u003e\n\u003cli\u003eTemperature Measuring Range: -10 to 60℃\u003c\/li\u003e\n\u003cli\u003eResponse Time: 120s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePackage List:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eGravity: SCD41 Infrared CO2 Sensor x1\u003c\/li\u003e\n\u003cli\u003eGravity-4P I2C\/UART Sensor Cable x1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDocuments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/wiki.dfrobot.com\/sen0536\/\" target=\"_blank\"\u003eProduct Wiki\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":41623415128197,"sku":"SN-000238-DFR","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/1_2e797980-1e44-4798-baf9-f0f270b3253e.png?v=1778239733"}],"url":"https:\/\/robotpishop.com\/collections\/gas.oembed?page=2","provider":"Robot Pi Shop","version":"1.0","type":"link"}