Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1989-01-06
1991-05-21
Eisenzopf, Reinhard J.
Communications: electrical
Condition responsive indicating system
Specific condition
73304C, 361284, G08B 2100, G01F 2300, H01G 528
Patent
active
050179098
ABSTRACT:
A non-intrusive fluid level detector including a single point capacitive sensor mounted on the outside surface of a receptacle such that capacitive principles can be utilized to sense the level of a liquid contained within the receptacle. The sensor assembly is disposed in a substantially fixed position on the exterior wall of the receptacle wherein the dielectric effect of the liquid changes the effective capacitance of the sensing capacitor as the liquid rises and falls within the receptacle. This change in effective capacitance is detected by electronic circuitry included in the detector device. In one embodiment, the fluid level detector is directly mounted to a completely non-conductive receptacle. In another embodiment, the fluid level detector is mounted to a non-conductive window which is an integral part of a receptacle fabricated out of a conductive material.
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Eisenzopf Reinhard J.
Negash Kinfe-Michael
Standex International Corporation
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