Optical fluid sensor
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United States of America Patent
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May 28, 2002
Grant Date -
N/A
app pub date -
Jan 31, 2000
filing date -
Jan 31, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fluid sensor for determining the presence of fluid in a light-transmissive conduit includes a light emitter and a light detector positioned proximate to the conduit. The light detector is juxtaposed relative to the light emitter to receive light emitted by the light emitter. The light received by the light detector is dependent upon the presence of fluid in the conduit. The light received by the light detector varies due to the different optical properties between a conduit that is empty and one that has fluid in it. The light detector may be a phototransistor whose output is amplified to increase the signal attributable to the presence or absence of fluid in the conduit. The light emitter may be an
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