Differential pressure fluid level sensor

Details Differential pressure fluid level sensor Differential pressure fluid level sensor

1988-11-21

1989-07-04

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

73719, 73 1H, 338 42, G01F 2314

Patent

active

048438839

ABSTRACT:
A liquid fluid level sensor responds to differential pressure forces exerted on a diaphragm as produced by exposure of liquid fluid to one side and of atmosphere to the other side. An arched resistance card is movable with the diaphragm to engage the mid-portion of a metal spring which progressively overlies greater portions of the card as the diaphragm moves thereby changing the resistance of a circuit including the card and the spring.

REFERENCES:
patent: 2439092 (1946-09-01), Linstrom
patent: 2651939 (1953-09-01), Weaver
patent: 2943302 (1960-06-01), Clason
patent: 3242731 (1966-03-01), Colgan
patent: 4335608 (1982-06-01), Wood et al.
patent: 4358956 (1982-11-01), Ruben et al.

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