Capacitance probe and system for precision measurement of liquid

Details Capacitance probe and system for precision measurement of liquid Capacitance probe and system for precision measurement of liquid

1974-12-26

1976-05-18

Swisher, S. Clement

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

73304C, 324 61P, G01F 2326

Patent

active

039581594

ABSTRACT:
The capacitance probe consists of a vertical insulated wire stretched taut in the tank, or other container, where liquid level is to be measured. Fittings at the top and bottom conveniently and efficiently support and tighten the wire. The system comprises an oscillator which impresses a sinusoidal voltage in series with the probe, preferably through a transformer so that there are no active electronics at the probe. One end of the probe is at ground potential. A long transmission line may connect the probe to the measuring electronics.

REFERENCES:
patent: 2817234 (1957-12-01), Campbell
patent: 2836739 (1958-05-01), Mesh
patent: 3188865 (1965-06-01), Frost

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