Measuring device for the moisture content of granular materials

Details Measuring device for the moisture content of granular materials Measuring device for the moisture content of granular materials

1983-05-20

1985-10-15

Frankfort, Charles

Measuring and testing

Moisture content or absorption characteristic of material

By residual capacity measurement

324 61P, G01R 2726

Patent

active

045466459

ABSTRACT:
Capacitative device for measuring the moisture content of granular or powder materials, particularly materials in motion on a conveyor belt or in a pipe comprising a capacitative probe provided with at least two electrodes separated by an insulating zone and in contact with the material being examined, a support frame for the capacitative probe, and high frequency oscillator circuit associated with the electrodes in order to supply an alternating voltage of a frequency variable with the moisture content. The probe, which has a cylindrical body may be rotated by a motor and comprises cleaning scrapers mounted on the frame which cooperate with the body of the probe when the latter is rotating.

REFERENCES:
patent: 2848667 (1958-08-01), Rolfe
patent: 3348313 (1967-10-01), Urmenyi
patent: 3748686 (1973-07-01), Winterburn et al.
patent: 3783781 (1974-01-01), Grommek
patent: 3950698 (1976-04-01), Wochnowski
patent: 4154522 (1979-05-01), Ikesue
patent: 4278935 (1981-07-01), Ihara et al.

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