Fluid level sensor having capacitive sensor

Details Fluid level sensor having capacitive sensor Fluid level sensor having capacitive sensor

1991-04-24

1993-01-26

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

73304C, 340618, 324690, G08B 2100

Patent

active

051825457

ABSTRACT:
A capacitive liquid level sensor utilizes capacitive principles to sense the level of a liquid contained within a receptacle. As a liquid rises and falls in the container, the dielectric effect of the liquid changes the effective capacitance of a sensing capacitor which is detected by electronic circuitry coupled to the sensor. One plate of the sensor capacitor is a probe disposed within a receptacle while a grounded conductive portion of the receptacle is a second plate of the capacitor. The liquid within the receptacle acts as a dielectric between the plates.

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