Electronic gauge for interface measurements

Measuring and testing – Liquid level or depth gauge – Thermal type

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Details

33731, 3404503, 340622, G01F 2304, G01F 2324

Patent

active

052051722

ABSTRACT:
The interface gauge includes at least one transducer for sensing the interface between two media within a reservoir. An elongated flat member has at least one transverse bore. A transducer is loosely contained within the bore. Conductors connect the transducer to a signal comparator and logic network for monitoring an impedance change in the transducer in response to a change in the interface within the reservoir. The gauge can replace conventional mechanical dipsticks in factory made dipstick tubes for crankcases and automatic transmissions in order to monitor oil and transmission fluid levels.

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patent: 4654646 (1987-03-01), Charboneau
patent: 4679432 (1987-07-01), Draeger
patent: 4720997 (1988-01-01), Doak et al.
patent: 4771271 (1988-09-01), Zanini-Fisher
patent: 4988975 (1991-01-01), Nap

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