Delta-T Devices SWT5 User Manual page 12

12  Introduction
Reference air pressure
The reference atmospheric air
pressure is conducted to the
pressure transducer via the air
permeable (white) Teflon
membrane and through the
cable.
Sealed cable
The SWT5 can be completely
buried. Protect buried cables
Don't immerse white membrane.
Sensor body
The incorporated piezoelectric
pressure sensor measures the
soil water tension against
atmospheric pressure.
Acrylic glass shaft
Shafts are available with
lengths from 2 to 20 cm
High grade porous ceramic cup
Filled with degassed water.
wassergefüllt, mit Befüllröhrchen.
SWT5 User Manual v2