Capacitive liquid level sensor

Details Capacitive liquid level sensor Capacitive liquid level sensor

1978-12-21

1980-03-25

Woodiel, Donald O.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

361284, G01F 7326

Patent

active

041943953

ABSTRACT:
A capacitive liquid level sensor for sensing the height of liquid in a liquid storage tank at a plurality of locations. The liquid level sensor includes a cylindrical housing which extends along a line perpendicular to a predetermined reference level which is approximately parallel to the expected level of liquid in the storage tank. Several capacitors are included within the housing, each employing an air/liquid dielectric, whereby the capacitance values of the capacitors are individually variable due to any variations in the liquid height at each location. Several alternative cross-sectional structures are shown whereby the cylindrical housings are employed as a common plate to the several capacitors located within each housing.

REFERENCES:
patent: 2866337 (1958-12-01), Minneman et al.
patent: 3349301 (1967-10-01), Bell
patent: 3827300 (1974-08-01), Thaler
patent: 3830090 (1974-08-01), Hersch
patent: 3862571 (1975-01-01), Vogel
patent: 3916689 (1975-11-01), Donnelly
patent: 4001676 (1977-01-01), Hile et al.

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