Moisture detector
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United States of America Patent
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-
Sep 8, 1987
Grant Date -
N/A
app pub date -
Aug 27, 1984
filing date -
Aug 27, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A moisture detector for detecting the presence of moisture between two electrodes includes an AC sensing network coupled to an indicator circuit by an opto-isolator to isolate impedances between the two circuits. The battery life of the detector is extending by a unique pulsing technique that creates current drain in the sensing circuit for only brief intervals of time. The pulsing technique enables the indicator circuit to keep an electronic switch in a closed-loop security system in an on state.
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