Measuring and testing – Liquid level or depth gauge – With illumination
Patent
1995-02-10
1998-04-28
Gutierrez, Diego F. F.
Measuring and testing
Liquid level or depth gauge
With illumination
73319, 340619, 340624, 250577, 250901, 250904, G01F 23292, G01F 2364
Patent
active
057431353
ABSTRACT:
A liquid level monitor uses a tube to confine a float to a vertical path with a canister containing a lower liquid and an upper liquid which meet at a liquid boundary, the level of which is to be monitored. Light from a light-emitting diode is conveyed to a vertical position of the tube by an optical fiber. A second optical fiber is arranged in a diametrically opposed position of the tube to detect light transmitted across the tube from the first optical fiber. The float is more transmissive than either liquid. When the level of the boundary falls to the level of the optical fibers, received light increases. The second optical fiber conveys this return light to a photodetector, the output of which can be used to trigger an alarm indicating that the boundary level is low.
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Rocks Robert J.
Sayka Anthony
Anderson Clifton L.
Gutierrez Diego F. F.
VLSI Technology Inc.
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