Fluid indicator for a containment vessel

Details Fluid indicator for a containment vessel Fluid indicator for a containment vessel

1987-11-17

1989-11-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73293, G01N 1506

Patent

active

048809829

ABSTRACT:
A fluid indicator for use in a containment vessel. A sensor body is movable by a drive relative to the vessel. An indicator automatically indicates the location of the sensor body relative to the vessel. A passage is in the body through which fluid from the vessel can be viewed and a light emitter is positioned in the body so as to direct a beam through the fluid. A light sensor also positioned in the body receives light after it passes through the fluid and produces a signal in response thereto.

REFERENCES:
patent: 3192392 (1965-06-01), Reed
patent: 3535934 (1970-10-01), Papata
patent: 3683196 (1972-08-01), Obenhaus
patent: 4200806 (1980-04-01), Walker et al.
patent: 4500793 (1985-02-01), Kuramoto
patent: 4501972 (1985-02-01), Foerster, Jr. et al.

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