| 摘要 |
A gas sensor is provided with a structure in which a cylindrical filter is provided inside a sealing member fixed to a casing by crimping, which is capable of preventing extreme deformation of the filter upon crimping with the casing, and so prevent deterioration in accuracy of the detection of gas to be measured. A through hole 132 is formed at roughly the center of a sealing member 13 provided in an outer tube member 11 surrounding a sensor element 2. Inside the through hole 132 is provided a cylindrical filter 133 with a metal cup 134 between the two. The sealing member 13 is then fixed by crimping with the outer tube member 11. In the case of forming a second crimping portion 115 under the above conditions, even if the part of the sealing member 13 at the second crimping portion 115 is deformed inward by compression, the metal cup 134 absorbs the compression force from the sealing member 13 and prevents the filter 133 provided inside the metal cup 134 from being extremely deformed.
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