Level measuring device for electrically non-conductive liquids

Details Level measuring device for electrically non-conductive liquids Level measuring device for electrically non-conductive liquids

1987-09-11

1989-01-03

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 61R, G01R 2726

Patent

active

047959673

ABSTRACT:
In a level measuring device for electrically non-conductive liquids comprising a sensor which is positioned in a vessel and is in contact with the liquid, and further comprising an evaluation circuit connected to this sensor both compensation of a changing dielectric constant and a high degree of accuracy and resolution are achieved by placing a driver electrode 5 in the lower part of the vessel 1 at a position essentually coaxial to the sensor electrode 3, 4, and by placing a compensating electrode 6 between the driver electrode 5 and the wall 8 of the vessel 1, such that further capacitors are formed between the two electrodes 5 and 6 themselves as well as between them and the sensor electrode 3, 4 and between them and the wall 8 of the vessel 1.

REFERENCES:
patent: 2700901 (1955-02-01), Rickner
patent: 2866337 (1958-12-01), Minneman et al.
patent: 4347741 (1982-09-01), Geiger
patent: 4555661 (1985-11-01), Benson et al.

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