The measuring principle of this system is both simple and gives high quality readings. It consists in measuring the vacuum created in an airtight system filled with water which equilibrates with the soil through the porous ceramic. The meter reads the water potential when the water goes in or out of the Polycarbonate tube result from the soil dryness or wetness.

The porous ceramic cup is glued to the bottom of a hollow PVC tube which will be set into the soil to measure its water potential.

Features:
Low cost device;
No need to calibration or zero setting;
Maintenance simple and Polycarbonate tube, years to use;
Every parts can be removed and replaced

Includes:
Pointer meter
Polycarbonate tube
Porous ceramic cup

Technical parameters:
Porous ceramic cup: 2cm(D)×7cm (L or user-defined)
Polycarbonate tube length: 15-120 cm (user-defined)
Measure Range: 1Bar
Precision: 2.5% (meter)

Options:
Pressure Sensor: replacement of the pointer meter, easily to connect with a datalogger
Soil Drills: 22cm(D)×60 cm(L), extensions: 60 cm