Sensor for determining electrical characteristics of a flowing l

Details Sensor for determining electrical characteristics of a flowing l Sensor for determining electrical characteristics of a flowing l

1992-11-18

1995-05-16

Regan, Maura K.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

73 6143, G01R 2726, G01N 1500

Patent

active

054164257

ABSTRACT:
A sensor for measuring dielectric constant or resistivity of a flowing liquid, and especially of fuel mixtures for determining alcohol content, includes an inner tube through which the liquid flows, an outer sleeve about the inner tube in coaxial relation, holes in the inner tube to provide fluid communication at two locations to the space between the tube and the sleeve, and a partial restriction in the tube to divert some of the fluid flow into the space between the tube and the sleeve. The tube forms the inner electrode of a capacitor and the sleeve forms the outer electrode of the capacitor to measure dielectric constant. The ends of the sleeve are sealed in liquid tight fashion.

REFERENCES:
patent: 2892976 (1959-06-01), Thayer
patent: 4543191 (1985-09-01), Stewart et al.
patent: 4939467 (1990-07-01), Noglami et al.
patent: 5005402 (1991-04-01), Pischinger et al.
patent: 5231358 (1993-07-01), Kapsokavathis et al.

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