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Tensiometers are returning water tension in cBar, kPas or mBar. The pressure would be a negative value
because it indicates tension, but for simplification FieldClimate.com handles them as positive.

Tensiometer sensors are supported by the PI sensor nodes. There is a sensor node supporting 4
tensiometer pressure transducers and having a reference pressure sensor on the PCB. The inputs are
enumerated from 1 to 4. On FieldClimate.com the data is displayed following this enumeration with the
atmospheric pressure from the reference sensor as the leading value.

Every pressure transducer comes with a shielded 3 wire cable. The wires and th labels on the PCB are:
Bare: SH, WH: white, GR: green, BR: brown.