Liquid level sensor for use in a hot, pressurized liquid

Details Liquid level sensor for use in a hot, pressurized liquid Liquid level sensor for use in a hot, pressurized liquid

1997-05-15

1998-09-08

Allen, Stephone B

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250239, 73293, 340619, G01N 1506, G01N 2149

Patent

active

058048316

ABSTRACT:
In a preferred embodiment, a liquid level sensor for use in a hot, pressurized liquid, including: an outer housing suitable for immersion in the liquid; an inner housing disposed within the outer housing and containing therein electronic/electrical components; detection apparatus disposed within the outer housing and the inner housing to detect level of the liquid; a space defined between the outer housing and the inner housing; and means to permit the liquid which migrates through a wall of the outer housing into the space and which is vaporized therein to pass to the ambient surroundings, so as to preclude migration of the liquid through a wall of the inner housing.

REFERENCES:
patent: 3844171 (1974-10-01), Rodger
patent: 4038650 (1977-07-01), Evans et al.
patent: 4899585 (1990-02-01), Kulha
patent: 5648844 (1997-07-01), Clark

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