Means, employing a fluidic oscillator, for determining the densi

Details Means, employing a fluidic oscillator, for determining the densi Means, employing a fluidic oscillator, for determining the densi

1978-05-01

1979-10-16

Gill, James J.

Measuring and testing

Gas analysis

Density or specific gravity

137804, G01N 900

Patent

active

041708946

ABSTRACT:
In order to determine the density of a test gas, the test gas is employed as the working fluid through an astable fluidic oscillator. Air, at the same temperature and pressure, is passed through the same or a like fluidic oscillator to obtain a second pulse repetition frequency reading. The density of the test gas is the ratio of the two pulse repetition frequencies. Preferably, for a given fluidic oscillator, graphs and/or tables are prepared giving the pulse repetition frequency of air at different temperatures and pressures in order that subsequent measurement of the pulse repetition frequency using a test gas will permit direct determination of the specific gravity of the test gas from a graph or table.

REFERENCES:
patent: 3273377 (1966-09-01), Testerman et al.
patent: 3373600 (1968-03-01), Taplin
patent: 3554004 (1971-01-01), Rauch et al.
patent: 3918292 (1975-11-01), Stolzy
patent: 4007625 (1977-02-01), Houben et al.

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