Measuring and testing – Liquid level or depth gauge – Thermal type
Patent
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
Bezard Jean-Jacques
Jourdain Charles-Henri
Lalanne Bruno
Jaeger
Jeffery Donald D.
Woodiel Donald O.
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