Compact structure of gas sensor and production method thereof

摘要

An improved structure of a gas sensor (1) is provided. The gas sensor (1) includes a hollow housing (4) in which a gas sensing element (10) is disposed, a protective cover (2) installed on an end of the housing, a metallic cover (3) installed on the other end of the housing, and an insulator (5) in which end portions of leads (81,91) connecting with the gas sensing element (10) are disposed. The insulator (5) is retained at a flange thereof in the metallic cover (3) elastically using a washer (6). The protective cover (2) is welded at an end thereof to the whole circumference of the end of the housing (4).