Liquid-level monitor

Details Liquid-level monitor Liquid-level monitor

1980-01-02

1981-09-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73293, G01N 1506

Patent

active

042874270

ABSTRACT:
An apparatus for detecting the level of a liquid in a container by modulating the intensity of light propagating through a fiber-optic light guide, a section of which has the cladding removed or partially removed. The system consists of a light source which is coupled into the input end of a fiber, a section of fiber from which the cladding is removed, a liquid-containing vessel into which the unclad fiber section can become immersed, and a detector at the output end of the fiber.

REFERENCES:
patent: 3448616 (1969-06-01), Wostl et al.
patent: 3995169 (1976-11-01), Oddon
patent: 4082959 (1978-04-01), Nakashima

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