Industrial Soil Moisture & Temperature & EC Sensor MODBUS-RTU RS485 (S-Soil MTEC-02A)

The Seeed Soil Moisture, Temperature & EC Sensor delivers accurate 0–100% VWC, –40 to +80°C, and 0–10,000 μS/cm measurements with RS485 output and IP68 durability — ideal for agriculture, irrigation systems and long-term soil monitoring.

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This Seeed sensor monitors soil moisture, temperature and electrical conductivity (EC), with measurement ranges of 0–100% saturation, –40 to +80°C, and 0–10,000 μS/cm. These parameters are key indicators of soil health and fertility, making the sensor suitable for a wide range of industrial and environmental monitoring tasks.

Soil EC reflects the salt content of the soil. High salinity can prevent plants from taking up water even when moisture levels are high, eventually causing damage or “burning.” Plants grow best within specific ranges of moisture, temperature and EC, so having reliable data helps growers understand the soil conditions and make informed decisions to support healthy growth and higher yields.

The Soil Moisture, Temperature & EC Sensor (MODBUS-RTU RS485) is built to industry standards, offering high precision, sensitivity and long-term durability. It combines three sensing functions into one device and includes automatic temperature compensation to maintain accurate readings despite changing environmental conditions.

By measuring the soil’s dielectric constant, the sensor provides stable and consistent volumetric water content (VWC) measurements across different soil types, following recognised international standards for soil moisture monitoring.

The stainless steel probe is designed for permanent installation and quick testing, with an IP68 rating for long-term reliability in the field. It’s suitable for scientific studies, water-saving irrigation, greenhouses, outdoor farming, horticulture, golf course turf management, forestry, precision agriculture and other professional monitoring applications. It can also be used to measure EC in water, nutrient solutions and other substrates.

It is compatible with SenseCAP LoRaWAN® Data Logger to connect with the LoRaWAN® network, enjoying the benefits of low-power and long-range communication.

Features

• High Performance: high accuracy, reliability, and stability
• Universal Protocol: MODBUS-RTU RS485
• Compact Design: 3-in-1, soil moisture, temperature, and EC sensor
• Wide-range Power Supply: Can be powered with supply voltage within 3.6V ~ 30V
• Strong Robustness: Suitable to be immersed in soil, water, nutrient solution, and other substrates for a long time, anti-corrosion, automatic temperature compensation
• Strong Anti-interference: made of flame-retardant epoxy resin

Specifications

Product Model	S-Temp&VWC&EC-02A
Interface	RS-485
Protocol	MODBUS-RTU RS485
Power Supply	3.6 ~ 30V DC
Current Consumption	6mA@24V DC (quiescent dissipation)
Operating Temperature	-40℃ ~ +85℃
Probe Material	Anti-corrosion special electrode
Sealing Material	Black flame-retardant epoxy resin
IP Rating	IP68
Cable Length	5 meters
Installation	All buried or probe into the media to be measured
Device Weight	210g
Supplier Code	101990667

Soil Temperature

Range	-40℃ ~ +80℃
Accuracy	± 0.5 ℃
Resolution	0.1℃

Soil Moisture

Range	From completely dry to fully saturated (from 0% to 100% of saturation)
Accuracy	±2% (0~50%) ±3% (50~100%)
Resolution	0.03% (0~50%) 1% (50~100%)

Electrical Conductivity

Range	0 ~ 10000 μs/cm
Accuracy	± 3%
Resolution	10 μs/cm
Temperature Compensation	Built-in temperature compensation sensor, Range: 0-50°C

Dimensions

Resources

• Wiring Diagram
• Datasheet
• User Manual

Package Contents

• 1x Industrial Soil Moisture & Temperature & EC Sensor MODBUS-RTU RS485 (S-Soil MTEC-02A)