Simplified method and device for sensing water level in a reservoir
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United States of America Patent
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Sep 1, 2015
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app pub date -
Jun 11, 2012
filing date -
Jun 17, 2011
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Abstract
A simplified method and device for sensing water level is disclosed. In particular applications the invention may be used for activating a fill valve or other control circuitry in order to maintain an average level in a reservoir or provide notification of a low fluid level. By incorporating a standard rectifier circuit as a biasing network for a solid-state circuit control driver on one side of a probe network, the level of the water may be determined when contact is made with the probes. AC current drawn across metallic probes provides a DC bias at the output of the rectifier that may be incorporated into various control circuits.
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