Vaisala QMT103 Soil/Water Temperature Probe 

The QMT103 Soil/Water Temperature Probe is particularly well suited for precision measurement of ground and soil temperatures. All materials have been carefully selected to withstand various types of environmental stress and a wide range of temperatures.

The measurement accuracy and stability of the temperature probe are based on a Pt-100 type sensor element, which is specified to a level of preciseness of 1/4 DIN 43760B. The probe includes a 5-meter cable with a black, weather-resistant polyurethane (PUR) sheath, which can tolerate both abrasive wear and extreme temperatures. Molded to the other end of the cable there is a 5-pin watertight connector, which allows instant assembly and replacement. Cable lenghts can be extended with extension cable(s). Also available is QMT110 with 10 m cable.