soil volumetric water content

Soil Volumetric Water Content SensorThe SM100 is a low cost, high accuracy soil moisture sensor for the measurement of volumetric water content.

Based on the capacitance measurement principle, the SM100 is ideal for researchers, students and growers for scientific experiments in the field or glasshouse, or monitoring and controlling irrigation.

The SM100 is an analog voltage sensor that is compatible with our low cost, dedicated data loggers, or our range of telemetry data loggers. We can also assist you in connecting the SM100 to your existing data logging system.


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feature specification
Measurement Principle Capacitance
Measurement Range 0% soil volumetric water content (VWC) to saturation
Resolution 0.1% VWC
Accuracy 3% VWC with manufacturer's calibration | 1% VWC with custom calibration
Power Requirements 3 to 5V @ 6 to 10 mA
Output Analog voltage 0.5 – 1.5V for a 3V excitation (ratiometric for other excitation voltages)
Cable Length 1.8 m (standard) | 6 m (optional) | 15 m (optional)
Sensing Area 6 cm x 2 cm



Download SM100 Soil Moisture Sensor Manual


further information