Liquid gaging system contamination monitor

Details Liquid gaging system contamination monitor Liquid gaging system contamination monitor

1980-05-14

1982-12-14

Kreitman, Stephen A.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

G01F 2326

Patent

active

043632394

ABSTRACT:
The present invention is part of a liquid gaging system and comprises an apparatus for monitoring a quadrature signal from a capacitor sensor. Included is a capacitive sensor for providing a liquid measurement signal related to a liquid in a tank, the liquid measurement signal comprising a capacitive signal and a quadrature signal. The invention also includes apparatus for monitoring the quadrature signal through null detection of the capacitive signal, the null detection being implemented through a rebalance approximation sequence. The apparatus for monitoring is connected to the sensor.

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