TDR Vdc moisture probe

TDR Soil Moisture SensorThe TDR-Vdc soil moisture probe is an ideal solution for scientists and engineers needing a high accuracy, TDR soil moisture measurements that is compatible with most data logging platforms.


related products


Most TDR sensors require a specialised interface, such as the Campbell Scientific TDR100, to convert the electromagnetic pulse from a time domain reflectometry (TDR) measurement to a meaningful value such as dielectric permittivity or volumetric water content.

The TDR-Vdc soil moisture probe removes the need to use the expensive, specialised interfaces and allows the scientist and engineer to connect the sensor directly to their data logger. The TDR-Vdc has an analog voltage output and can therefore be connected to most commonly available data logging platforms.

The TDR-Vdc soil moisture probe is also embedded with a temperature sensor for accurate measurements of soil, substrate or materials temperature.



soil moisture

  • Measurement Principle: TDR (Time domain reflectometry)
  • Measurement Range: 0 to 100% VWC
  • Accuracy: VWC: 0÷40%: ± 1%; VWC: 40÷70%: ± 2%
  • Sensor (Rods) Length: 11cm



  • Measurement Principle: Pt100 1/2 DIN B
  • Accuracy: ± 0.2°C


general information

  • Power Supply: 6 to 24 Vdc
  • Power Consumption: Sleep: 5 mA; Measuring: 120 mA
  • Cable: Standard Length = 5 m
  • Output: 2 x 0 to 1 V


further information