Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-03-10
1989-11-21
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, 73293, G01N 1506
Patent
active
048824992
ABSTRACT:
A liquid detector utilizing fiber optics, by which the presence of oils and various solvents can be detected. The detector is internally safe because the optical fiber is an insulator and may therefore be used to monitor liquids involving fire or explosive hazards. The detector may be used to detect leakage when storing oils and solvents, because it reacts most rapidly with these liquids. The detector makes use of capillarity of a sensing pick-up thereof, the optical reflection coefficient of the pick-up material changing as the pick-up material comes into contact with the liquid to be detected.
REFERENCES:
patent: 4159420 (1979-06-01), Tsunoda
patent: 4386269 (1983-05-01), Murphy
Luukkala Mauri
Matilainen Aarre
Viirto Jarmo
Shami Khaled
Soundek Oy
Westin Edward P.
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