Capacitive fluid presence detector for gas pipe using an excited

Details Capacitive fluid presence detector for gas pipe using an excited Capacitive fluid presence detector for gas pipe using an excited

1991-08-12

1992-12-01

Strecker, Gerard R.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324663, 324686, 340603, G01R 2726

Patent

active

051682400

ABSTRACT:
A liquid presence detector and method of using the same for a gas fluid pipe includes a helically wound insulated wire positioned inside the pipe such that an outer periphery of the wire contacts an inner surface of the pipe along an axial portion thereof. The pipe and wire form two plates of a capacitor with the pipe being connected to electrical ground for electromagnetic shielding and shock protection. The wire plate of the capacitor contacts liquid particles that travel along the pipe wall. A circuit is provided to measure capacitance between the wire and the pipe to detect liquid contacting the wire and pipe.

REFERENCES:
patent: 2752543 (1956-06-01), Smith
patent: 3569824 (1971-03-01), Ruse
patent: 3635082 (1972-01-01), Prellwitz et al.
patent: 3662367 (1972-05-01), De Veau, Jr. et al.
patent: 3922601 (1975-11-01), Martin, Jr.
patent: 4374379 (1983-02-01), Dennison, Jr.

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