| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the measurement accuracy in a sensor for measuring a concentration of NOx by utilizing first and second pump cells. <P>SOLUTION: The NOx sensor 2 is provided with the first pump cell 10 comprising a solid electrolyte layer 4a, a first lower face electrode 12 and a first upper face electrode 14 formed on lower and upper faces of the solid electrolyte layer 4a, and the second pump cell 20 comprising the solid electrolyte layer 4a, a second lower face electrode 22 and a second upper face electrode 24 formed on the lower and upper faces of the solid electrolyte layer 4a. The first lower face electrode 12 reduces the NOx contained in a measured gas in a gas introducing chamber 6, and generates nitrogen. The second lower electrode 22 does not reduce the NOx. The first and second lower face electrodes 12, 22 are adjacently formed on the lower face of the solid electrolyte layer 4a. A profile of an adjacent part horizontally viewed has recesses and protrusions mutually intruding. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
