| 主权项 |
1. A temperature sensor comprising:
a temperature sensing element including a temperature sensing portion, electrical characteristics of which vary depending on the temperature, and an electrode wire that outputs an electric signal from the temperature sensing portion to an outside; and a signal wire electrically connected to the electrode wire, wherein the electrode wire is made of a platinum-rhodium alloy, the platinum-rhodium alloy comprises 0.1 to 1.5 mol % of Sr, 22 to 40 mol % of Rh, and a remainder composed of Pt and unavoidable impurities, the platinum-rhodium alloy has a second-phase composed essentially of Sr and Pt whose precipitated grains are dispersed in a matrix phase, and an area ratio of the second phase at a cross section is not greater than 25%. |
