Apparatus for high oxygen concentration measurement using...

Details Apparatus for high oxygen concentration measurement using... Apparatus for high oxygen concentration measurement using...

G - Physics

01

N

G01N 37/00 (2006.01) G01N 27/00 (2006.01) G01N 27/407 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2215875

A gas analysis apparatus using multiple orifices of preselected sizes to attain a calculated gas mixing ratio for diluting an oxygen sample to a concentration less than 95% prior to application to a limiting current oxygen sensor. The apparatus comprises a regulator for regulating the pressures of incoming flows of air and oxygen sample to be measured, a valve for allowing the concentration of the air sample to oxygen sample to be measured, and a system for calculating the air sample/oxygen sample mixing ratio based on the known air sample concentration and then, based on the known air concentration and calculated mixing ratio, calculating the unknown sample concentration from the output of the oxygen sensor.

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