| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable temperature sensor having both superior durability in the sensor itself and speedy responsivity even in the case where a heat sensing part is reduced in diameter or thinned in wall thickness. SOLUTION: A cylindrical metal tube 3 housing a thermistor element 2 of which the electrical characteristics change according to temperature is inserted in a flange 4. The metal tube 3 is fixed to a tip-side sheath part 43 by caulking. Since a welded part L1 between the metal tube 3 and the flange 4 is not exposed to a high-temperature environment in an exhaust gas passage in the temperature sensor 1 of this constitution, the oxidation of the welded part hardly occurs, and it is possible to improve airtightness reliability to exhaust gases. COPYRIGHT: (C)2004,JPO
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