| 摘要 |
<p>A gas sensing element includes a solid electrolytic substrate (11) having oxygen ion conductivity, a measured gas side electrode (15) provided on a surface of the solid electrolytic substrate (11) so as to be exposed to a measured gas, and a reference gas side electrode (16) provided on another surface of the solid electrolytic substrate (11) so as to be exposed to a reference gas. The measured gas side electrode is covered by a porous electrode protecting layer (17). A limit current density of the electrode protecting layer (17) is in a range from 0.04 mA/mm<2> to 0.15 mA/mm<2> on a unit area of the reference gas side electrode. <IMAGE></p> |
