Gauge for measuring the level or the conductance of a liquid pre

Details Gauge for measuring the level or the conductance of a liquid pre Gauge for measuring the level or the conductance of a liquid pre

1984-12-03

1987-06-23

Frankfort, Charles

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

361284, G01F 2326

Patent

active

046743294

ABSTRACT:
A gauge for measuring the height of a liquid in a vessel comprises a measuring electrode (M) and a compensation electrode (R) in the vessel, and a circuit which measures the capacitance C.sub.M of the measuring electrode and the capacitance C.sub.R of the compensation electrode, each with respect to a wall of the vessel as counter-electrode, using the liquid in the vessel as dielectric. The quotient C.sub.M /C.sub.R varies with the height of the liquid in the vessel. The measuring electrode and the compensation electrode are parallel and of the same length, but differ in surface area and shape to such extent that such quotient varies as a linear function of the height of the liquid in the vessel.

REFERENCES:
patent: 2230137 (1941-01-01), Ewerte
patent: 2741124 (1956-04-01), Meyers
patent: 2752543 (1956-06-01), Smith
patent: 2849882 (1958-09-01), Lee
patent: 3230770 (1966-01-01), Hermanson
patent: 3596517 (1971-08-01), Ryder
patent: 3620080 (1971-11-01), Ryder

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