Soil moisture 1.5m sensor probe

     Sensor specifications (Watermark)

Measurement range: 0 ~ 200 cb

Frequency range: 50 ~ 10000 Hz approximately

Diameter: 22 mm

Terminals: AWG 20

The Watermark sensor by Irrometer is a resistive type sensor consisting of two electrodes highly resistant to corrosion embedded in a granular matrix below a gypsum wafer. The resistance value of the sensor is proportional to the soil water tension, a parameter dependent on moisture that reflects the pressure needed to extract the water from the ground. The function of the library readValue returns the frequency output of the sensor’s adaptation circuit in Hertz (Hz).