摘要 |
A gas sensor (1) including a protector (100) for protecting a detection portion (11) of a sensor element (10). The protector (100) has an inner protector (120) and an outer protector (110). A diameter r of an exhaust hole (160) formed in the inner protector (120) and an axial distance h between a front end 10a of the sensor element 10 and the exhaust hole (160) satisfy a relation r≦̸2h/15+⅓.
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