06125696 is referenced by 23 patents and cites 45 patents.

A digital liquid level sensing apparatus for detecting variations in the dielectric of a substance being sensed, to thereby provide a signal indicative of the level of the liquid being sensed in relation to a known full level. The apparatus includes a reservoir having an output plate and an input plate assembly associated therewith. The input plate assembly includes a plurality of independently electrically excitable input plates which transmit a signal through the liquid being sensed to the output plate. The signals from the output plate are processed and a determination is made as to the level of liquid in the reservoir relative to a known full level. If the input plate assembly is located against the exterior surface of one wall of the reservoir, then both of the interior and exterior portions of that particular wall should be devoid of any metallic surface. In an alternative embodiment, a discardable interior reservoir is provided which fits nestably within the reservoir of the sensor. The interior reservoir is particularly useful for measuring water-based bodily fluids such as urine, where it may be desirable to discard just the reservoir after use.

Title
Digital liquid level sensing apparatus
Application Number
143834
Publication Number
6125696
Application Date
March 19, 1998
Publication Date
October 3, 2000
Inventor
Ted W Lewis
Sardinia
OH, US
Thomas M Nickolin
Cincinnati
OH, US
Alan R Hannan
Cincinnati
OH, US
Agent
Harness Dickey & Pierce
Assignee
KDI Precision Products
OH, US
IPC
G01F 23/26
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