Measuring and testing – Gas analysis – Gas chromatography
Patent
1984-03-13
1985-09-03
Kreitman, Stephen A.
Measuring and testing
Gas analysis
Gas chromatography
G01N 3100
Patent
active
045384479
ABSTRACT:
The molecular weight of a pressurized flowing gas is determined by means of a vortex tube. The temperatures of the inlet gas to the tube and of its outlet hot and cold gas fractions are sensed by electromotive force-producing temperature-sensing means; the resulting e.m.f.'s are employed to ascertain differential e.m.f.'s and then to form a ratio of differential e.m.f.'s. The ratio is then converted to the molecular weight of the gas, either by means of a pre-established ratio-molecular weight relationship or converter, such as a graph of variance or a mathematical equation, or, preferably, by means of an electric circuit in which the differential e.m.f.'s, the ratio, and the molecular weight are ascertained instantaneously and the molecular weight is simply read off a meter.
REFERENCES:
patent: 3165146 (1965-01-01), Smith et al.
patent: 3173273 (1965-03-01), Fulton
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