Microwave probe for detecting oil level

Details Microwave probe for detecting oil level Microwave probe for detecting oil level

1984-11-15

1985-10-01

Krawczewicz, Stanley T.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

324 61P, 324 585R, G01R 2704

Patent

active

045438234

ABSTRACT:
A microwave probe for measuring the amount of soot or water in engine crankcase oil and/or detecting the level of oil comprises a coaxial cable having a tip including five substantially parallel wires shorted together at one end and connected at the other end to the coaxial cable, one of the wires being connected to the center wire of the coaxial cable and the other four wires being connected to the sheath of the coaxial cable. The size and geometry of the wires is selected so that the impedance of the tip when immersed in oil substantially matches the impedance of the coaxial cable.

REFERENCES:
patent: 3226615 (1965-12-01), Nagel
patent: 3572119 (1971-03-01), Bak
patent: 3626284 (1971-12-01), Bak
patent: 3703829 (1972-11-01), Dougherty
patent: 3812422 (1974-05-01), De Carolis
patent: 4345202 (1982-08-01), Nagy
patent: 4503384 (1985-03-01), Nagy

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