发明名称 |
CO sensor and method of measuring CO concentration |
摘要 |
<p>Through application of a first predetermined voltage between first and second electrodes 7 and 8, hydrogen contained in a gas under measurement which has been introduced into a first measurement space 2 via a first diffusion-controlling section 1 is dissociated, decomposed, or reacted with another element in order to generate protons. The thus-generated protons are moved from the first electrode 7 to the second electrode 8 via a first proton-conductive layer 5 or protons are moved from the second electrode 8 to the first electrode 7 via the first proton-conductive layer 5 (when the hydrogen concentration of the measurement gas is extremely low), so that the hydrogen concentration within the first measurement space 2 is controlled to a constant level. The gas under measurement having a controlled hydrogen concentration is introduced into a second measurement space 4 via a second diffusion-controlling section 3, and a second predetermined voltage is applied between third and fourth electrodes 9 and 10. The CO concentration of the gas under measurement is obtained on the basis of current (limiting current of protons) which flows between the third and fourth electrodes 9 and 10. Alternatively, the CO concentration of the gas under measurement is obtained from electromotive force generated between the third and fourth electrodes 9 and 10. <IMAGE></p> |
申请公布号 |
EP1221610(A2) |
申请公布日期 |
2002.07.10 |
申请号 |
EP20020250041 |
申请日期 |
2002.01.04 |
申请人 |
NGK SPARK PLUG COMPANY LIMITED |
发明人 |
NADANAMI, NORIHIKO;KONDO, TOMONORI;INOUE, RYUJI;ISHIDA, NOBORU;OSHIMA, TAKAFUMI |
分类号 |
G01N27/407;G01N27/41;G01N27/406;G01N27/416;G01N27/419;G01N33/00;(IPC1-7):G01N27/407 |
主分类号 |
G01N27/407 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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