Liquid-level sensor utilizing ferromagnetic fluid

Details Liquid-level sensor utilizing ferromagnetic fluid Liquid-level sensor utilizing ferromagnetic fluid

1975-02-25

1976-03-23

Harris, G.

Electricity: circuit makers and breakers

Float

Float and pressure

335 2, 335 56, 73313, H01H 3518

Patent

active

039461777

ABSTRACT:
The invention is directed to a liquid-level sensor utilizing a ferromagnetic fluid. The magnetic characteristics of the fluid are utilized in a magnetic circuit which generates the output signal and are also useful in the mechanical operation of the sensor. The magnetic characteristics of the ferromagnetic fluid, therefore, serve a twofold purpose in the inventive sensor.

REFERENCES:
patent: 3555221 (1971-01-01), Booth
patent: 3826139 (1974-07-01), Bachman
patent: 3839904 (1974-10-01), Stripling et al.
Francis J. Lavoie, "Magnetic Fluids Engineering Kit and Application Sketches," 6/14/74, Ferrofluids Corp., Burlington, Mass.

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