Two-stage gas measurement system

Details Two-stage gas measurement system Two-stage gas measurement system

1992-05-07

1994-12-20

Johnston, Jill A.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

204426, 422 88, 422 98, G01N 2712

Patent

active

053744004

ABSTRACT:
A quick-response, real-time gaseous measurement system allows for the continuous sampling of a low pressure gaseous environment. A sample of test gas from the low pressure gaseous environment is continuously extracted and pumped to a structural tee joint which is open to the atmosphere at one end to maintain the test gas at a constant pressure. The structural tee joint communicates at the other end with a heater for maintaining the test gas at a constant temperature. From the heater, the test gas is sent to a sensor which develops a voltage that is proportional to the partial pressure of the gaseous component to be measured in the test gas, a constant flow rate to test gas being provided through the heater and sensor. Since test gas pressure, temperature, and flow rate are being held constant, changes in sensor voltage are attributable only to changes in the concentration of the measured gas component.

REFERENCES:
patent: 4341108 (1982-07-01), Warncke et al.
patent: 4911890 (1990-03-01), Singh et al.

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