Electrical sensor for determining the moisture content of soil

Details Electrical sensor for determining the moisture content of soil Electrical sensor for determining the moisture content of soil

1993-09-14

1995-12-26

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324663, 324664, 73 73, G01R 2726

Patent

active

054791049

ABSTRACT:
An improved soil moisture sensor and circuity are described which permit a more compact, simplified, and less expensive integrated unit wherein the essential circuitry of the device is sealed within the sensor head. Determinations of resistance and capacitance are made using a coaxial or other capacitor having spikes or probes which are inserted into the soil or other material.

REFERENCES:
patent: 3581197 (1971-05-01), Morey, Jr.
patent: 4137931 (1979-02-01), Hasenbeck
patent: 4168466 (1979-09-01), Boldt
patent: 4278934 (1981-07-01), Ihara et al.
patent: 4278935 (1981-07-01), Ihara et al.
patent: 4288742 (1981-09-01), Walsh
patent: 4540936 (1985-09-01), Walsh
patent: 4929885 (1990-05-01), Dishman

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