Method and apparatus for detection of fluid level in a container
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United States of America Patent
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Oct 31, 2006
Issued Date -
N/A
app pub date -
Jan 19, 2000
filing date -
Jan 19, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A fluid level sensor is disclosed having first and second vertically and horizontally nonoverlapping electrode plates for placing on a wall of a fluid container. Most preferably, the plates are also vertically spaced from each other. The capacitor plates are driven by a high frequency square wave. By forming nonoverlapping plates and driving them using a high frequency, the level of a fluid within the container, particularly viscous fluid, is more accurately detected. Control and detection circuitry is also disclosed to trigger an alarm if the fluid level drops below a critical level within the container.
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