Linear output moisture meter with temperature compensator

Details Linear output moisture meter with temperature compensator Linear output moisture meter with temperature compensator

1975-06-16

1976-06-01

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

G01R 2702

Patent

active

039612473

ABSTRACT:
Apparatus for electrically measuring the water content of a specimen such as grain the electric resistivity of which has a correlation with the water content, comprising a linearizer for converting the measured electric resistivity in the low water content region in which the electric resistivity of a grain specimen changes non-linearly with the water content into an electric quantity linearly changing with the water content, and a temperature compensator including a temperature sensitive element for generating a linearly changing electric signal with temperature, the temperature compensator generating a temperature-compensating electric signal from said linearly changing temperature signal, the temperature compensation of the measured value being commonly done with said temperature compensator in both the low and the high water content ranges by adding a linearly changing electric quantity corresponding to the measured water content and the compensating electric signal.

REFERENCES:
patent: 3416076 (1968-12-01), Clinton
patent: 3441846 (1969-04-01), Petrohilos

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