The ICTGT3-30 sensor measures in the range of -100 to +200 kPa. This version has a 4-20mA output.
GT3-30 Tensiometer Transducer -100 to 200 kPa Features
|Range:||-100kPa to +200kPa|
|Temperature shift:||Temperature compensated in the range 0–50°C—typical shift 0.5% full scale.|
The soil water tension is transmitted via the ceramic cup into the tensiometer. The vacuum inside the tensiometer is measured by a pressure transducer, which gives a continuous analogue output signal.
A resolution of 0.1 kPa (1 cm H2O) can be attained for the GT3 Tensiometer Transducer.
The accuracy actually obtained is related to the calibration and resolution of the AD converter. In field applications the values obtained should consider the shaft/cup length of the tensiometer: 1 cm = 0.1 kPa.