Capacitance level sensor

Details Capacitance level sensor Capacitance level sensor

1997-08-28

1999-10-26

Fleming, Fritz

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307125, 324686, 324690, 324689, 324688, 34087037, H01H 3500

Patent

active

059734159

ABSTRACT:
A capacitive level sensor for sensing level of a in a vessel includes a sensor coupled to the vessel having a shield and an inner sensing rod. An oscillator provides an RF signal to the shield and the sensing rod. Comparison circuitry couples to the sensing rod provides a wet/dry output in response to capacitance between the inner sensing rod and the vessel, the capacitance related to the level of the liquid in the vessel.

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