Grain moisture measurement probe

Details Grain moisture measurement probe Grain moisture measurement probe

1976-04-30

1977-08-30

Gill, James J.

Measuring and testing

Moisture content or absorption characteristic of material

324 61P, 324 61QS, G01R 2726

Patent

active

040446077

ABSTRACT:
An apparatus for measuring the moisture content of grain includes a probe having an oscillator circuit therein. The oscillator circuit includes a function generator, temperature sensing means in contact with the grain and a pair of juxtapositioned capacitor electrodes within the probe, but not in contact with the grain. The output of the oscillator circuit is connected to readout means including a phase locked loop, operational amplifier and indicating means.

REFERENCES:
patent: 3046479 (1962-07-01), Mead et al.
patent: 3426271 (1969-02-01), Alais
patent: 3681685 (1972-08-01), Tarry et al.
patent: 3794911 (1974-02-01), Fathauer
Motorola-Silicon Zener Diode and Rectifier Handbook, pp. 98-101 (1961).

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