Probe for measuring the level of a liquid

Details Probe for measuring the level of a liquid Probe for measuring the level of a liquid

1974-09-26

1976-04-06

Swisher, S. Clement

Measuring and testing

Liquid level or depth gauge

73304R, 336183, G01F 2328

Patent

active

039481000

ABSTRACT:
A probe of the mutual inductance type with a linear response which is independent of temperature comprises a rigid support, two insulated cables disposed in interengaged relation and wound on the support, means for supplying one of the cables C.sub.1 with alternating current having constant amplitude and frequency, means for measuring the voltage between the two extremities of the second cable C.sub.2. A single resistor R is placed between the extremities of the cable C.sub.2, the resistance value of the resistor and the value of the frequency f being determined so as to ensure that the variations in voltage measured between the extremities of the cable C.sub.2 are reduced to zero in respect of any given level of liquid outside the probe.

REFERENCES:
patent: 1693898 (1928-12-01), Horle
patent: 3402607 (1968-09-01), Cambillard

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