| 摘要 |
A gas sensor according to the present invention comprises a sensor element 2 that detects a specific gas concentration in measured gases, a housing 3 that retains the gas sensor inserted therein, and an element cover 4 disposed on the axial direction end side Z1 thereof, wherein a gas introduction unit 25 is provided at the axial direction front end 21 of the sensor element 2. The element cover 4 comprises an inner cover 5 and an outer cover 6 disposed outside the inner cover 5 with a space 41 therebetween. An inner side surface flow-through hole 511 provided in the inner cover 5 is provided on the axial direction base end side Z2 with respect to a reduced diameter stepped portion 53. A distance L1 in the axial direction Z between the front end 21 of the sensor element 2 and a base end position 513 of the inner side surface flow-through hole 511 is at most 1.6 mm. |
