Main Characteristic

The Thetaprobe soil moisture sensor measures the soil moisture volume percentage by applying the Frequency Domain technique. The Thetaprobe measures the soil moisture volume percentage by measuring the changes in the dielectric constant. The sensor consists of a sturdy, watertight synthetic housing which contains the electronics.
The sensor is able to measure within a measuring range of 5 – 55 volumetric moisture content with an accuracy of 5% with standard calibration and only 2% with soil specific calibration.
The sensor is supplied standard with a 90cm cable and plug for connection to the soil moisture meter or with wire for connection to a datalogger. The measurement values are shown on the display of the soil moisture meter and can be stored in the memory (including time and sensor location).
The meter comes with built-in conversion characteristics for mineral and organic soils.