Gas sampling system having a mouthpiece
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United States of America Patent
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Apr 14, 1998
Grant Date -
N/A
app pub date -
Dec 4, 1996
filing date -
Dec 8, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The combination of the invention includes a mouthpiece 1 and a sample-taking system 8 for analyzing a gas sample. The mouthpiece 1 has a flow resistor 5 in the exhalation direction and a sample-taking connecting element 6 for the gas sample to be analyzed. The sample-taking system 8 has a pump and a through-flow measuring device 13. The pump pumps the sample gas flow from the sample-taking connecting element via a sample line 9 into a measuring chamber 15 of an analyzer 16. The combination is improved in such a manner that calibration is made possible with a calibrating gas flow greatly reduced compared to the flow of gas to be measured. This is achieved in that the sample-taking connecting element 6 is connected to the mouthpiece 1 forward of the flow resistor 5 viewed in the exhalation direction. The sample line 9 includes a flow throttle 11 in through-flow direction and an outlet opening 12 opening to the ambient. The through-flow measuring device 13 is connected to the sample line 9 forward of the flow throttle 11 as seen in the through-flow direction. The pump 14 takes the gas sample between the flow throttle 11 and the outlet opening 12.
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