| 摘要 |
A gas sensor is provided which includes a first cylindrical insulation porcelain having a gas sensor element installed therein and a second cylindrical insulation porcelain disposed in contact with the first insulation porcelain. The first insulation porcelain is disposed on a seat surface formed on an inner wall of a housing through a packing ring. A contact between the first and second insulation porcelains being located within a contact permissible range defined by projecting outer and inner edges of the packing ring onto an end surface of the first insulation porcelain, thereby minimizing a lateral shift between the contact and the packing ring to avoid the breakage of the first insulation porcelain during assembly or use of the gas sensor.
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