Liquid thickness gauge

Details Liquid thickness gauge Liquid thickness gauge

1987-09-30

1988-08-23

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

73290R, G01F 2300

Patent

active

047651873

ABSTRACT:
A method and apparatus to measure the thickness of liquid 12 on a surface 14 independent of liquid conductivity. Two pairs of round, corrosion resistant wires, 18 and 20, are mounted in an insulating material 16 such that the cross-sectional area of each wire is flush with and normal to the surface 14. The resistance between each pair of wires 18 and 20 is measured using two AC resistance measuring circuits 22 and 24 wherein the ratio of the outputs of the two resistance measuring circuits is indicative of the thickness of the liquid 12 on the surface 14.

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patent: 3855861 (1974-12-01), Zimmermann et al.
patent: 3861212 (1975-01-01), Henry
patent: 3873927 (1975-03-01), Overall
patent: 3905236 (1975-09-01), Henry
patent: 3986110 (1976-10-01), Overall et al.
NASA Technical Memorandum 85796 "Preliminary Indications of Water Film Distribution and Thickness on an Airfoil in a Water Spray", Earl C. Hastings, Jr., and Leonard M. Weinstein, Jul. 1984.
J. Mikielewicz and F. G. Hammitt, Generalized Characteristics of Electrical conductance Film Thickness Gauges, Report No. Umich 012449-7-I, Michigan University, Dec. 1974.

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