Measuring and testing – Gas analysis – Impurity
Patent
1998-04-20
2000-04-04
Brock, Michael
Measuring and testing
Gas analysis
Impurity
422 93, 436110, G01N 2404
Patent
active
060446897
ABSTRACT:
The disclosed apparatus for sensing low concentration NOx in a measurement gas especially in the atmosphere has at least a sensor element made of an oxide arranged in a flow path of the measurement gas, the resistance of the sensor element varying in response to changes in NOx concentration in the measurement gas. As suitable options of this type of the NOx sensor, there are disclosed a chamber used for an apparatus for sensing low concentration NOx, a gas sensor element and a method of manufacturing the gas sensor element, and an ammonia removing apparatus and an NOx sensor utilizing the ammonia removing apparatus.
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Ogawa Naoyuki
Ohtsubo Shinji
Takahashi Tomonori
Yoshida Toshihiro
Brock Michael
NGK Insulators Ltd.
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