| 摘要 |
PROBLEM TO BE SOLVED: To provide an NOx sensor excellent in sulfur poisoning characteristic, by an inventive material which makes up an electrode disposed on a solid electrolyte body. SOLUTION: The NOx sensor 100 comprises: the solid electrolyte body 110 having a U-shaped cross section in its axial direction; an outside electrode 120 formed on the outer surface of the solid electrolyte body 110; and an inside electrode 130 formed on the inner surface of the solid electrolyte body 110, wherein NOx is detected in accordance with a variation in impedance between both electrodes 120, 130. The outside electrode 120 is exposed to a gas to be detected and is composed of Au and a solid electrolyte material. COPYRIGHT: (C)2008,JPO&INPIT
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