Device for the measurement of the moisture content of a sample

Details Device for the measurement of the moisture content of a sample Device for the measurement of the moisture content of a sample

1976-11-12

1979-05-15

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2704

Patent

active

041550358

ABSTRACT:
The damping of a microwave resonator by the sample to by examined is used as a measurement for the moisture content of the sample. In this arrangement use is made of a microwave generator whose frequency range is selected so that the complete resonance curve of the resonator both when empty and when supplied with the sample is covered. The measurement head containing the resonator is in the form of an insertion and immersion probe and consists of a one part cavity resonator which is provided at the point of maximum electrical or magnetic field strength with a perforation having a diameter of .phi.<0.5.lambda.(.lambda.=microwave length). Through this perforation a scattered electrical field passes into the sample applied to it or guided over it.

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