Measurement of impurity concentration in liquids

Details Measurement of impurity concentration in liquids Measurement of impurity concentration in liquids

1977-01-26

1978-08-01

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2704

Patent

active

041045858

ABSTRACT:
Apparatus for the measurement of the concentration of impurities in liquids comprising two microwave cavity resonators, means for enabling a standard sample of liquid to be coupled to one of the resonators to affect the resonant frequency thereof, means for enabling a sample of liquid under test to be coupled to the other resonator to affect the resonant frequency thereof, and means for mixing the outputs from the resonators to derive a difference frequency dependent on the difference in concentration of particles in the two samples.

REFERENCES:
patent: 2457673 (1948-12-01), Hershberger
patent: 2580968 (1952-01-01), Sproull
patent: 2597327 (1952-05-01), Hollingsworth
patent: 2792548 (1957-05-01), Hershberger
patent: 2964703 (1960-12-01), Sargent et al.
patent: 2965841 (1960-12-01), Smoll
patent: 2972104 (1961-02-01), Ward
patent: 3577071 (1971-05-01), Collins
patent: 3688188 (1972-08-01), Bak et al.
patent: 3737770 (1973-06-01), Masson et al.

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