5-in-1 NPK, pH & EC Soil Sensor – RS485
The 5-in-1 NPK, pH & EC Soil Sensor is a multi-parameter agricultural monitoring probe designed to measure important soil characteristics, including nitrogen (N), phosphorus (P), potassium (K), pH, and electrical conductivity (EC).
Equipped with an RS485 communication interface, the sensor enables digital data transmission over long cable distances, making it suitable for smart agriculture, greenhouse automation, soil monitoring, and industrial agricultural systems.
The sensor features five stainless-steel probes and a 2-meter cable for convenient installation in soil monitoring applications.
Key Features
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5-in-1 Soil Monitoring: Measures nitrogen, phosphorus, potassium, pH, and electrical conductivity.
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NPK Detection: Provides estimates of essential soil nutrient levels.
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Soil pH Measurement: Helps monitor soil acidity and alkalinity.
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Electrical Conductivity Measurement: Supports monitoring of soil conductivity and salinity-related changes.
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RS485 Communication: Suitable for long-distance digital data transmission.
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Wide Power Supply Range: Operates from 5V to 30V DC.
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Five-Probe Design: Designed for direct insertion into soil.
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2-Meter Cable: Provides flexible installation options.
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Automation Integration: Suitable for compatible PLCs, microcontrollers, and agricultural monitoring systems.
Technical Specifications
| Parameter |
Specification |
| Product Type |
Multi-Parameter Soil Sensor |
| Measurement Parameters |
Nitrogen, Phosphorus, Potassium, pH, EC |
| Number of Parameters |
5 |
| Probe Type |
5-Pin Soil Probe |
| Communication Interface |
RS485 |
| Operating Voltage |
5–30V DC |
| Cable Length |
2 Meters |
| Output Type |
Digital |
| Installation Method |
Direct Soil Insertion |
| Applications |
Agriculture and Soil Monitoring |
Communication and Connection
The sensor uses an RS485 interface for communication with compatible controllers and monitoring equipment.
Typical Integration Options:
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Arduino: Through a compatible TTL-to-RS485 transceiver module.
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ESP32: Through a 3.3V-compatible RS485 transceiver.
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Raspberry Pi: Through a compatible USB-to-RS485 adapter.
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PLC Systems: Through an available RS485 communication port.
The exact wiring, communication protocol, baud rate, and register addresses must be confirmed from the sensor manufacturer's documentation before integration.
Applications
- Smart Agriculture
- Precision Farming
- Greenhouse Monitoring
- Soil Nutrient Monitoring
- Agricultural Research
- Soil pH Monitoring
- Soil Conductivity Monitoring
- Automated Agricultural Monitoring Systems
- IoT-Based Farming Projects
Important Notes
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Power Supply: Requires a suitable 5–30V DC supply.
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RS485 Interface: Cannot connect directly to standard UART pins without an appropriate RS485 interface.
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Communication Protocol: Confirm whether the supplied model supports Modbus RTU and obtain its register map before integration.
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NPK Measurements: Nutrient readings from electrical soil probes may be estimates and should not be considered equivalent to laboratory soil analysis.
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Calibration: Measurement accuracy depends on soil conditions and the manufacturer's calibration method.
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Installation: Ensure proper contact between the sensing probes and the soil.
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Water Resistance: The probe's waterproof rating has not been confirmed. Protect cable connections and associated electronics from moisture.
Package Includes
