Delta-T - Model PR2 - Soil Moisture Profile Probe - User Manual

The Profile Probe measures soil moisture content at different depths within the soil profile. It consists of a sealed polycarbonate rod, ~25mm diameter, with electronic sensors (seen as pairs of stainless steel rings) arranged at fixed intervals along its length. When taking a reading, the probe is inserted into an access tube. The access tubes are specially constructed thin-wall tubes, which maximise the penetration of the electromagnetic field into the surrounding soil. The output from each sensor is a simple analogue dc voltage. These outputs are easily converted into soil moisture using the supplied general soil calibrations or the probe can be calibrated for specific soils.