Patent ID: 6286995
Filing Date: 2001-09-11
Classification: F01N,G01K

Abstract:
A temperature sensor in combination with a wall portion and an attachment device attaching the temperature sensor to the wall, the temperature sensor comprising:a wiring member for holding conductive core wires in a metal outer cylinder through an insulating material;a temperature sensitive element connected to an end of the core wires at an end of said wiring member;lead wires connected at a connecting portion to the other end of said core wires at the other end of said wiring member;a metal seal member directly welded to an outer peripheral surface of said metal outer cylinder, said seal member being constructed and arranged to engage and be kept in close contact with a surface of a hole formed in the wall portion when said sensor is inserted therein and attached to the wall portion with the attachment device, for preventing the leakage of an object fluid from said hole, the wall portion defining a passage in which the object fluid is to flow; anda cylindrical protective member for covering a connecting portions between said core wires arid said lead wires;wherein said protective member is coupled to said seal member at a portion of said seal member farther away from said temperature sensitive element than a weld between said seal member and said outer cylinder.