Method and apparatus for measuring a parameter of a gas in...

Details Method and apparatus for measuring a parameter of a gas in... Method and apparatus for measuring a parameter of a gas in...

G - Physics

01

N

G01N 1/22 (2006.01) A61B 5/083 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2068662

A method and apparatus for measuring a para- meter of a test gas in isolation from gas pressure fluctuations. A pump draws the test gas through an air capacitor into a sensor, storing the gas in the capaci- tor. A valve closes a fluid flow path which admits the test gas to the air capacitor and opens a fluid flow path between the air capacitor arid a constant pressure alter- nate gas source, isolating the air capacitor and the sensor from pressure fluctuations in the test gas. The air capacitor prevents any mixing of the test gas with the alternate gas until measurement of the unknown parameter has been accomplished.

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