Moisture meters

Electricity: measuring and testing – Conductor identification or location – Inaccessible

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Details

361286, G01R 2726

Patent

active

040217337

ABSTRACT:
A meter for determining the moisture content of grain or hay uses two variable capacitors. A sample of the material is compressed between the electrodes of one of the capacitors and acts as its dielectric, while the other capacitor, with a known dielectric such as air, has its capacitance simultaneously varied. The ratio of capacitances can be used to give a direct readout of the moisture content of the sample.

REFERENCES:
patent: 3009101 (1961-11-01), Locher
patent: 3025465 (1962-03-01), Breen
patent: 3039051 (1962-06-01), Locher
patent: 3109984 (1963-11-01), Mehr
patent: 3371568 (1968-03-01), Felix

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