Liquid sensing system
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United States of America Patent
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-
Mar 29, 1988
Issued Date -
N/A
app pub date -
Aug 13, 1986
filing date -
Oct 24, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A liquid level sensing system having a sensing head with a pair of mutually insulated metal electrodes, one of the electrodes connected to the output of an amplifier and the other to the input. The gain of the amplifier is sufficienty high such that it will oscillate when the electrodes are immersed in a liquid and will be non-oscillatory when the electrodes are in air. The oscillation of the amplifier is detected to produce a signal corresponding to the presence of a liquid and also its characteristic.
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