Properties of a High-Temperature Platinum Resistance Thermometer up to 1350 °C

Arai, Masaru; Kawata, Akiyoshi
September 2003
AIP Conference Proceedings;2003, Vol. 684 Issue 1, p381
Conference Proceeding
Properties of high-temperature platinum resistance thermometers developed at NMIJ are studied in the range from 1100 °C to 1350 °C. The HTPRTs have shown drift rates of 0.1 mK/h at 1100 °C and 0.5 mK/h at 1170 °C. The W(29.7646 °C) values of the HTPRTs increased after exposure at 1100 °C, while they slightly decreased at 1150 °C and 1170 °C. After exposed at 1170 °C for 500 hours, three of six HTPRTs showed W(29.7646 °C) values larger than 1.118 07. It was also found that the decrease in resistance continued above 1200 °C up to 1350 °C. © 2003 American Institute of Physics


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