Liquid-level detector

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Patent

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Details

73293, 250227, G01N 2126

Patent

active

041328990

ABSTRACT:
A light-emitting element and a light-responsive element are optically connected with each other through a U-shaped optical guide. An output level of the light-responsive element indicates whether the U-shaped guide is above or below the liquid-level.

REFERENCES:
patent: 2620660 (1952-12-01), Goldsmith
patent: 3282149 (1966-11-01), Shaw et al.
patent: 3683196 (1972-08-01), Obenhaus
patent: 3917410 (1975-11-01), Ulrich
M. E. Freeman, "Liquid Level Indicator," IBM, Technical Disclosure Bull., vol. 5, No. 1, Jun. 1962.

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