Method and apparatus for measuring the proportion of undissolved

Details Method and apparatus for measuring the proportion of undissolved Method and apparatus for measuring the proportion of undissolved

1976-09-17

1978-05-16

Gill, James J.

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 700

Patent

active

040892069

ABSTRACT:
The instant invention relates to a method and apparatus for measuring the proportion of undissolved gas in a liquid component for the production of foam materials, particularly those based on polyurethanes. The method is based on the equation of state of ideal gases (Boyle-Mariot Law: p.multidot.v = constant) at constant temperatures. The gaseous portion of a liquid component charged with gas increases its volume under expansion according to the above equation. The gas expansion also increases the liquid volume. The differences in the volumes, of the liquid at two differing pressures is therefore a measurement of the quantity of gas present in the liquid. The apparatus consists of a closed graduated measurement vessel being connected to a variable pressure means capable of producing at least two different defined pressures.

REFERENCES:
patent: 2138141 (1938-11-01), Cromer
patent: 2141977 (1938-12-01), Gray
patent: 2280075 (1942-04-01), Hayward
patent: 2668437 (1954-02-01), Patch

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