Patent ID: 6501366
Filing Date: 2002-12-31
Classification: G01K

Abstract:
A thermistor-type temperature sensor for determining a temperature of exhaust gas from an engine, comprising:a thermistor element having a thermistor section made of a thermistor material, and a pair of electrode wires constructed and arranged to conduct thermistor signals, said wires extending in the same direction from said thermistor section and one end of each of said wires being fixed to the thermistor section by shrink fitting, a wiring member comprising a pair of electrically conductive core wires connected to said electrode wires and an outer tube that covers said core wires and contains an insulating powder, the core wires constructed and arranged to conduct signals from said thermistor element out of the outer tube, and a cover, housing said thermistor element that is welded and fixed to said outer tube of said wiring member wherein said electrode wires comprise a dispersion-strengthened material consisting essentially of 100 wt % of platinum and 0.02-2 wt % of metal oxide, or an alloy of platinum and iridium, said dispersion-strengthened material having crystal grains oriented along a longitudinal axis of said electrode wires and said crystal grain size of said dispersion-strengthened material being one-half the wire diameter or less.