Tensior T8 - Eijkelkamp Agrisearch Equipment

10.2 Osmosis
The ceramic used has a pore size of 1 µm. Thus, ions can hardly be kept out.
An influence of the measured value by osmotic effect is negligible under normal
circumstances. If the T8 is dipped into saturated NaCl solution 10 hPa are
measured. Either consider this fault or fill the water with this solution (after it
has been degassed).
10.3 Emptying the T8
Freezing of the Tensiometer water will destroy the pressure sensor and
possibly the cup. Therefore, frost endangered Tensiometer must be
removed from the soil or emptied.
In non-freezing depths Tensiometers can remain in the ground in winter.
Procedure for emptying:
1. Remove the connecting rubber tube from the refilling tube.
2. Connect the empty syringe to the refilling tube.
3. Completely suck out the Tensiometer water.
4. Connect rubber tubes and filing tube.
Until now, we received no tensiometer with freezing damage while installed in
the soil deeper than 30 cm, although the soil was frozen.
30