Electro-optic liquid sensor with the use of reflected residual light to enable a test of the sensor
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United States of America Patent
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Apr 14, 2020
Grant Date -
Feb 1, 2018
app pub date -
Oct 6, 2017
filing date -
Sep 10, 2013
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Abstract
A method of operating an electro-optic sensor includes disposing at least a portion of the electro-optic sensor in a liquid chamber, providing light from a light source of the electro-optic sensor at a first intensity, driving a light detector of the electro-optic sensor at a first sensitivity level, receiving, via the light detector, a first amount of light from the light source; determining whether liquid is present in the liquid chamber according to the first amount of light, providing light from the light source at a second intensity, driving the light detector at a second sensitivity level, receiving, via the light detector, a second amount of light from the light source, and/or confirming whether liquid is present in the liquid chamber according to the second amount of light. The first sensitivity level may be different from the second sensitivity level.
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