Capacitance liquid level detector

Details Capacitance liquid level detector Capacitance liquid level detector

1981-11-12

1984-01-31

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

331 65, 361395, G01F 2326, H05K 118

Patent

active

044282320

ABSTRACT:
An electric liquid level detector for detecting the remaining quantity of liquid stored within a liquid container, comprising a pair of helically coiled electrodes extending vertically in the container and being fixed at their one ends to the upper portion of the container and at their other ends to the bottom of the container, the electrodes being submerged into the liquid stored within the container; and an oscillator circuit of the resistance capacity type including a variable condenser which consists of the electrodes, the oscillator circuit being arranged to oscillate at a frequency in dependence upon variation of the electrostatic capacitance between the electrodes so as to indicate the level of the stored liquid.

REFERENCES:
patent: 2703857 (1955-03-01), Engelhardt et al.
patent: 2752543 (1956-06-01), Smith
patent: 2817234 (1957-12-01), Campbell
patent: 2830945 (1958-04-01), Keidel
patent: 2950426 (1960-08-01), Frome
patent: 3050999 (1962-08-01), Edwards
patent: 3140608 (1964-07-01), Clark
patent: 3958159 (1976-05-01), Rauchwerger
patent: 4204427 (1980-05-01), Gothe et al.

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