| 摘要 |
<p>A gas sensor functioning by introducing the air from the outside, which can maintain the air introduction property even at elevated temperatures. The water repellant filter (62) for closing the second air hole (58) provided on the sealing member (17) is formed in a sheet-shape, and fixed in the second air hole via a cylindrical inserting member (64). In other words, since the second water repellant filter is formed in a sheet-shape, sufficient gas permeability is obtained. Even when the oxygen sensor is subjected to heat from the flow path, its gas permeability can be maintained because the second water repellant filter is fixed in the sealing member and thus it is not much affected by heat. Therefore, the air is positively introduced into the cylindrical cover. <IMAGE></p> |
