Patent ID: 8192081

Claim:
A temperature sensor comprising: a temperature sensing element having a temperature sensing unit and a pair of device electrode wires extending from the temperature sensing unit; a sheath member including a sheath wire connected at a junction to at least one of the device electrode wires and a sheath outer pipe retaining the sheath wire in an insulating material; an inner tube made of a metal which has a cylindrical shape having a closed bottom at a front end thereof, said inner tube accommodating the temperature sensing element and the junction in the closed bottom of the inner tube serving as a front end of the temperature sensor, and extending rearward in an extension direction of the device electrode wire and the sheath wire; and a cylindrical outer tube having an open end, when viewed in a direction perpendicular to an axial direction of the inner tube, said outer tube covering the inner tube such that the open end is located frontward of the junction and rearward of or aligned with the front end of the inner tube, and being spaced from the inner tube at the front end side of the junction, wherein the sheath member is disposed within the inner tube, and a front end of the sheath outer pipe is rearward of the junction.