UMS T8 User Manual page 9

Tensiometer T8
External syringe refilling
Installed T8 can be refilled or ventilated through the
two capillary tubes (stainless steel) without being
removed from the soil. The tubes can be extended.
With the supplied refilling syringe a measuring range of
at least -80 kPa can be assured. With the special
Refilling Kit BKT456 a range of -85 kPa can be
assured.
Reference air pressure
The reference atmospheric air pressure is conducted
to the pressure transducer via the water impermeable
(white) Teflon membrane and through the cable.
The membrane must always have contact to the air
and should never be submersed into water.
Optional protective plastic tube
Available as accessory
Cable gland (IP67)
The T8 can be completely buried if required. Cables
and tubes of buried T8 should be protected. Special
cable glands are available for tight connection of a
cable protection tube.
Shaft
One-piece shafts from 10 cm to 200 cm are available.
Shafts over 200 cm are divided with threaded adapter.
Sensor body incl. electronics
Direct connection between internal power converter to
6-18 VDC
Pressure sensor
The piezoelectric pressure sensor measures the soil
water tension against atmospheric pressure
Temperature and level indicator
High grade porous ceramic cup
Filled with degassed water.
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