The TGS813 Gas Sensor Module is a semiconductor-based combustible gas detection module designed to detect gases such as LPG, natural gas, and methane.

Equipped with a TGS813 gas sensing element, the module provides both analog (AO) and digital (DO) outputs, making it suitable for integration with Arduino, ESP32, and other microcontroller-based systems.

The onboard potentiometer allows users to adjust the digital detection threshold, while the analog output provides a voltage signal that varies with gas concentration.

This module is suitable for educational projects, gas monitoring prototypes, and automated ventilation systems.

Key Features

• Combustible Gas Detection: Sensitive to LPG, natural gas, methane, and other combustible gases.
• Dual Outputs: Analog (AO) and digital (DO) signals.
• Adjustable Sensitivity Threshold: Onboard potentiometer for digital output adjustment.
• 5V DC Operation: Designed for a regulated 5V power supply.
• Digital Switching Output: Can interface with microcontrollers or suitable relay control circuits.
• Analog Gas Monitoring: Output voltage changes with detected gas concentration.
• LED Indicators: Onboard power and digital output status indicators.
• Compact PCB Design: Includes mounting holes for convenient installation.
• Semiconductor Sensing Technology: Designed for long-term gas detection applications.
• Microcontroller Integration: Suitable for Arduino, ESP32, and compatible development boards with appropriate voltage interfacing.

Technical Specifications

Pin Configuration

Note: Verify the printed pin labels on the actual module before wiring.

Arduino Connection Example

The TGS813 module can be connected to an Arduino Uno for gas detection and monitoring.

The Arduino can read the analog output to monitor changes in gas sensor response or use the digital output to trigger an LED, buzzer, or alarm circuit.

ESP32 Connection

The module can also be connected to an ESP32 with appropriate voltage-level protection.

• VCC: Connect to a suitable regulated 5V supply.
• GND: Connect to ESP32 GND.
• AO: Connect to an ESP32 ADC input through a suitable voltage divider or signal-conditioning circuit.
• DO: Connect to an ESP32 GPIO through a suitable 5V-to-3.3V level-shifting circuit.

Important: ESP32 GPIO pins are not 5V tolerant. Do not connect a 5V analog or digital output directly to an ESP32 GPIO pin.

Applications

• Combustible Gas Detection Projects
• LPG Leakage Monitoring Prototypes
• Natural Gas Monitoring
• Methane Detection Experiments
• Arduino Gas Sensor Projects
• ESP32 Gas Monitoring Systems
• Smart Home Automation Prototypes
• Automatic Ventilation Control
• Gas Detection Alarm Demonstrations
• Educational Electronics and Sensor Experiments

Important Notes

• The sensor requires an initial warm-up period after power-up. Allow additional stabilization time for more consistent readings.
• The analog output provides a relative gas response and does not directly indicate an accurate gas concentration in ppm without appropriate calibration.
• The onboard potentiometer adjusts the digital switching threshold.
• Sensor response may be influenced by temperature, humidity, and the presence of other gases.
• The sensor is not selective to one specific gas.
• Use a regulated 5V power supply capable of supplying the required current.
• This module is intended for development, experimentation, and monitoring prototypes.
• Not suitable as a replacement for a certified combustible gas safety detector or life-safety alarm.

Package Includes

• 1 × TGS813 Gas Sensor Module