Liquid level sensor

Details Liquid level sensor Liquid level sensor

1976-02-23

1978-04-04

Tolin, Gerald P.

Electricity: circuit makers and breakers

Float

Float and pressure

340 52C, H01H 3518

Patent

active

040829308

ABSTRACT:
A liquid reservoir such as that for a brake master cylinder has a float in the liquid, a magnet and a reed switch secured to the float at a fixed spacing so that normally at high liquid level the reed switch is in a given state. When the liquid level falls, the float approaches a body of magnetic material suspended at a desired level in the reservoir or the bottom of the reservoir which comprises magnetic material. When low liquid level is reached, the body of magnetic material alters the flux field from the magnet to either increase or decrease the influence the magnet on the reed switch to cause a change of state of the reed switch thereby indicating low liquid level.

REFERENCES:
patent: 3697942 (1972-10-01), Hocking
patent: 3896281 (1975-07-01), Feoktistov

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