Method and apparatus for measuring a change in surface level of

Details Method and apparatus for measuring a change in surface level of Method and apparatus for measuring a change in surface level of

1978-07-17

1980-01-08

Woodiel, Donald O.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

G01F 2314

Patent

active

041821785

ABSTRACT:
A sensitive J-tube employs an indicating liquid in the U-tube portion for use with an immiscible liquid thereabove. The longer leg of the J-tube has a larger cross-section area portion containing the immiscible liquid when the J-tube has been immersed therein. The arrangement is such that the J-tube will amplify any changes in surface level of the liquid into which it is immersed, by producing a differential between levels of the indicating liquid in the U-tube legs.
The principles are applied to a U-tube instrument to act as a manometer for measuring gas pressure differentials.

REFERENCES:
patent: 2068135 (1937-01-01), Howse
patent: 2870635 (1959-01-01), Vollbrecht et al.
patent: 4116076 (1978-09-01), Nolte

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