Device for checking the level of a liquid in a tank

Details Device for checking the level of a liquid in a tank Device for checking the level of a liquid in a tank

1977-09-28

1979-08-07

Woodiel, Donald O.

Measuring and testing

Liquid level or depth gauge

Thermal type

73304R, G01F 2310

Patent

active

041633911

ABSTRACT:
A device for checking the level of a liquid in a tank, for example a car fuel tank, has an electrical resistance probe partly immersed in the liquid and energized with a constant current. The voltage across the probe at switching on is stored and used as a reference for comparing with the increased voltage after the element has been heated to a value dependent on the length of resistor cooled by the liquid.

REFERENCES:
patent: 1942241 (1934-01-01), Duhme
patent: 2894390 (1959-07-01), Talbot
patent: 2924234 (1960-02-01), Wilson

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