| 摘要 |
To provide a sensor characterized in that corrosion of an outer tube member by adhesion of salt water or the like is restrained, thereby preventing deterioration in detection accuracy of the sensor, which could otherwise result from penetration of salt water or the like into the interior of the outer tube member. A sensor 100 of the present invention includes a sensor element 2; a metallic shell 4; an outer tube member 11 fixed to a rear end portion of the metallic shell 4; and a protective outer tube member 12 covering an outer surface of the outer tube member 11. The outer tube member 11 has a seal portion A being circumferentially in contact with the protective outer tube member 12 directly or via another member, and a front-side separation portion R1 located frontward of the seal portion A and spaced apart from and facing the protective outer tube member 12. A metal coating layer (plating layer M) is formed on the outer surface of at least the front-side separation portion R1 of the outer tube member 11.
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