Nitrogen oxide detector
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United States of America Patent
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Jan 19, 1999
Grant Date -
N/A
app pub date -
Sep 18, 1997
filing date -
Apr 8, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and a detector for detecting nitrogen oxide in test gas are provided wherein test gas which contains NOx and interference gases is supplied through an oxygen feeder 4 into a measuring chamber 1a, and the interference gases are oxidized by oxygen or oxygen ion supplied to the measuring chamber 1a through oxygen feeder 4. A total amount of NOx in the test gas is detected based on a level of EMF produced between a first electrode 2 for detecting oxygen and NO2 gas and a second electrode 3 for detecting oxygen.
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