Liquid-level gauging

Details Liquid-level gauging Liquid-level gauging

1993-03-05

1994-05-10

Gutierrez, Diego F. F.

Measuring and testing

Liquid level or depth gauge

367908, 367 99, 181124, G01F 2328

Patent

active

053097637

ABSTRACT:
An ultrasonic liquid-level sensing system has a sensor with a number of reflectors mounted one above the other along the length of a tube that extends upwardly from a transducer and is filled with liquid to the same height as outside the tube. Liquid height is calculated from the difference between the arrival times of the pulses reflected from the two uppermost submerged reflectors and the difference between the arrival times of pulses reflected from the surface of the liquid and the uppermost submerged reflector.

REFERENCES:
patent: 3214974 (1965-11-01), Altman et al.
patent: 3290944 (1966-12-01), Altman et al.
patent: 3693445 (1972-09-01), Johnson
patent: 4531406 (1985-07-01), Fritz
patent: 5095748 (1992-03-01), Gregory et al.
patent: 5121340 (1992-06-01), Campbell et al.
patent: 5127266 (1992-07-01), Maresca et al.

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