Apparatus for determining the water content of isotropic materia

Details Apparatus for determining the water content of isotropic materia Apparatus for determining the water content of isotropic materia

1978-05-30

1980-07-08

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 585A, G01R 2704

Patent

active

042119707

ABSTRACT:
The water content of electrically non-conductive powders, granulates, pastes and fibrous materials may be measured on the basis of microwave absorption. A frequency-modulated microwave oscillator supplies a closed multimode measuring resonator charged with the sample in a transmission arrangement. The sample charged into a container almost completely fills the multimode resonator. The sample container is rotatable about its longitudinal axis. A substantial homogeneity of the field distribution in the sample is thus obtained so that even in the case of variations in the bulk density, accurate measurements are still possible.

REFERENCES:
patent: 3265967 (1966-08-01), Heald
patent: 3426247 (1969-02-01), Loyen
patent: 3430139 (1969-02-01), Schluter
patent: 3439266 (1969-04-01), Rogers
patent: 3482161 (1969-12-01), Poulter
patent: 3691454 (1972-09-01), Hrubesh et al.
patent: 3737770 (1973-06-01), Masson et al.
patent: 3946308 (1976-03-01), Miura et al.
patent: 4131845 (1978-12-01), Pakulis

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