Optical fluid pressure sensor
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United States of America Patent
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-
Dec 3, 1985
Grant Date -
N/A
app pub date -
May 4, 1984
filing date -
May 4, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical pressure sensor including a light source, a light detector and a capillary system positioned in the light path between the light source and detector. The capillary system inlet receives liquid from the external source to be monitored, and the outlet is closed or connects with a closed gas reservoir. Light absorbing liquid forced by liquid pressure into the capillary system absorbs a portion of light corresponding to the area occupied by the liquid. This reduces the output of the light detector in an amount functionally related to the liquid pressure.
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