Apparatus for indicating dielectric constant

Details Apparatus for indicating dielectric constant Apparatus for indicating dielectric constant

1981-11-05

1984-01-31

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 60CD, 324 61QS, G01R 2726

Patent

active

044292724

ABSTRACT:
An apparatus for providing an indication of a change in the dielectric constant of a fluid comprises a pair of electrodes at least one of which in use is surrounded by the fluid, an oscillator operable to charge and discharge the capacitors formed by the electrodes, the frequency of oscillation of the oscillator being dependent upon the voltage developed across one of the capacitors, and means responsive to the difference in the voltages developed across the capacitors.

REFERENCES:
patent: 3037165 (1962-05-01), Kerr
patent: 4001676 (1977-01-01), Hile et al.
patent: 4065715 (1977-12-01), Jaffe et al.
patent: 4065721 (1977-12-01), Rabe
patent: 4228393 (1980-10-01), Pile
patent: 4240028 (1980-12-01), Davis, Jr.

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