Electrical sensor for sensing moisture in soils

Details Electrical sensor for sensing moisture in soils Electrical sensor for sensing moisture in soils

1992-04-10

1993-01-12

Harvey, Jack B.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324694, 73 73, G01R 2702

Patent

active

051793474

ABSTRACT:
A soil moisture sensor to be implanted in soil. The sensor has a conductive metal housing, perforated to pass moisture to and through a filter liner which lines an internal cavity. A transfer matrix is confined in the liner and is abutted by a buffer tablet of compacted gypsum. An electrode matrix abuts the tablet and bridges a pair of spaced-apart electrodes. Water, or absence of water, in the electrode matrix provides a measure of moisture in the soil as a function of electrical conductivity between the electrodes.

REFERENCES:
patent: 2941174 (1960-06-01), Richards
patent: 4531087 (1985-07-01), Larson
patent: 4952868 (1990-08-01), Scherer, III

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