Fluid level monitoring through fluid cell protrusion
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United States of America Patent
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-
Mar 11, 1980
Grant Date -
N/A
app pub date -
Jun 22, 1978
filing date -
Jun 22, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Monitoring the level of both opaque and clear liquids in a reservoir without contacting the liquids by providing first and second reservoir wall portions that define a region through which a light beam is passed from a light source to a light sensor so that opaque liquid extinguishes the light beam and so that the wall portions cooperate with the clear liquid to refract the light beam away from the sensor. A monitoring line segment, defined as the portion of a hypothetically unrefracted and unreflected light beam between the first and second reservoir wall portions, is a small fraction of the largest interior linear dimension of the reservoir in a plane containing the monitoring line segment and a line normal to the first reservoir wall portion.
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