Liquid-level gauging

Details Liquid-level gauging Liquid-level gauging

1993-02-23

1994-04-12

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

340621, 367908, G01F 2328

Patent

active

053015495

ABSTRACT:
An ultrasonic liquid level sensor has a transducer mounted at the lower end of an aluminum tube that projects upwardly in a liquid tank so that the tube is filled with liquid to the same height as that outside the tube. Internally, the tube has a layer of an acoustically-absorbing plastics to damp the transmission of ultrasonic vibration from the wall of the tube into liquid within the tube.

REFERENCES:
patent: 2990543 (1961-06-01), Rod
patent: 4063457 (1977-12-01), Zekulin et al.
patent: 4183007 (1980-01-01), Baird
patent: 4748846 (1988-06-01), Haynes
patent: 4896535 (1990-01-01), Duckart et al.
patent: 5095747 (1992-03-01), Smith
patent: 5095748 (1992-03-01), Gregory et al.

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