| 摘要 |
A temperature sensor ( 1 ) including a cylindrical metal tube ( 3 ) having a front end side blocked, a thermistor element ( 2 ), and a sheath member ( 8 ) connected to the thermistor element ( 2 ) and held in the inside of the metal tube ( 3 ), wherein: the metal tube ( 3 ) has a small-diameter portion ( 33 ) located on the front end side and entirely having an inner diameter smaller than the outer diameter of the sheath member ( 8 ), and a large-diameter portion ( 36 ) located on the rear end side of the small-diameter portion ( 33 ) and having a diameter larger than the outer diameter of the small-diameter portion ( 33 ); and a thermistor sintered body ( 21 ) is held in the small-diameter portion ( 33 ) and cement ( 10 ) is filled in between a front end of the thermistor sintered body ( 21 ) and a front end of an inner wall of the metal tube ( 3 ) and on the front end side viewed from a rear end surface of the thermistor sintered body ( 21 ).
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