| 摘要 |
A gas sensor (1) is provided with: a sensor element (2) having a solid electrolyte body (21), a measurement electrode (22), and a reference electrode (23); a housing (3) having the sensor element (2) inserted therein; and an element cover (4) provided on the distal-end side of the housing (3). The element cover (4) has an inner cover (41) disposed so as to cover a distal-end part of the sensor element (2) from the outside and an outer cover (42) disposed so as to cover the inner cover (41) from the outside. The axial distance (M) from the proximal end (401) of the internal space (40) of the inner cover (41) to the proximal end of the inner ventilation hole (5) furthest to the proximal-end side from among inner ventilation holes (5) provided in the inner cover (41) is 0.2L to 0.65L, where L is the axial distance from the proximal end (401) of the internal space (40) of the inner cover (41) to the proximal end of the measurement electrode (22). |
