Self-servicing hydraulic tensiometer with electrical switching a

Details Self-servicing hydraulic tensiometer with electrical switching a Self-servicing hydraulic tensiometer with electrical switching a

1989-01-30

1990-05-08

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

For controlling soil irrigation

13762411, 73 73, 239 63, A01G 2516

Patent

active

049229451

ABSTRACT:
A hydraulic tensiometer includes a pressure-sensitive electrical switch which acts to control an irrigation system in response to changes in matric water potential. Three chambers are defined in the tensiometer by moveable diaphragms. Two of the chambers are not in communication with the tensiometer probe, but are interconnected by a passageway. Flow through the passageway is controlled by an electrically operated valve.

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