Unicable liquid level sensing system

Details Unicable liquid level sensing system Unicable liquid level sensing system

1985-02-20

1986-08-05

Frankfort, Charles

Measuring and testing

Liquid level or depth gauge

Thermal type

340622, G01F 2322

Patent

active

046035800

ABSTRACT:
Double-junction thermocouple sensors located at axially spaced measurement zones within an elongated probe are interconnected in series to produce a combined output from differential signals generated by the sensors in response to unequal heating of the junctions. Axial heat flow between measurement zones is controlled to modify the combined output in a corrective direction with respect to a linear function of liquid level between the measurement zones.

REFERENCES:
patent: 2702476 (1955-02-01), DeBoisblanc
patent: 3280627 (1966-10-01), Cousins et al.
patent: 3964311 (1976-06-01), Holmen
patent: 4298430 (1981-11-01), Rolstad et al.
patent: 4319233 (1982-03-01), Matsuoka
patent: 4406011 (1983-09-01), Burns
patent: 4418035 (1983-11-01), Smith
patent: 4439396 (1984-03-01), Rolstad
patent: 4440717 (1984-04-01), Bevilacqua et al.
patent: 4449403 (1984-05-01), McQueen

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