Liquid level gauge

Details Liquid level gauge Liquid level gauge

1989-07-05

1991-01-01

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

With other measuring device

337207, 340449, 340450, 374142, H01H 3518, G01N 2706, G01K 716

Patent

active

049810391

ABSTRACT:
A gauge for detecting both the temperature and surface level of a fluid within a container. The gauge includes an elongated casing which extends into the fluid. A float which rises and falls with the fluid surface is slidably coupled to the casing and carries a magnet. A support member positioned within the casing carries both a sensor for determining the position of the magnet and a sensor for measuring the fluid temperature. The surface level of the fluid can be determined from the position of the magnet. A heat conducting element thermally couples the temperature detecting sensor to the fluid. In a preferred embodiment, the support member takes the form of a printed board. In a separate preferred aspect, the temperature and magnet detecting sensors are reed switches which are vertically spaced apart yet aligned in parallel to minimize interference.

REFERENCES:
patent: 1301910 (1919-04-01), Collins
patent: 4165935 (1979-08-01), Bongort et al.
patent: 4254375 (1981-03-01), Matsuoka
patent: 4356729 (1982-11-01), Kubota et al.
patent: 4442405 (1984-04-01), Andrejasich
patent: 4560973 (1985-12-01), Grimm et al.
patent: 4720997 (1988-01-01), Doak et al.
patent: 4748300 (1988-05-01), Anderson

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