Liquid level detector

Details Liquid level detector Liquid level detector

1976-06-24

1978-04-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, 73293, G01N 2126

Patent

active

040829596

ABSTRACT:
In an optical detector which comprises on U-shaped transparent bar, a photoemitting diode disposed at one end of the bar and a phototransistor disposed at the other end of the bar, means for ensuring light-transmission is provided.

REFERENCES:
patent: 3120125 (1964-02-01), Vasel
patent: 3384885 (1968-05-01), Forbush
patent: 3683196 (1972-08-01), Obenhaus
patent: 3834235 (1974-09-01), Bouton et al.
patent: 3895235 (1975-07-01), Melone

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