Platinum rhodium thermocouple can measure temperature range

Platinum rhodium can be divided into single platinum rhodium (platinum rhodium 10 platinum rhodium) and double platinum rhodium (platinum rhodium 30 platinum rhodium 6). As temperature measurement sensors, they are usually used in conjunction with temperature transmitters, regulators, and display instruments to form process control systems. They are used to directly measure or control the temperature of fluids, steam, gas media, and solid surfaces within the range of 0-1800 ℃ in various production processes.

Platinum rhodium thermocouple is a precious metal thermocouple. The diameter of the thermocouple wire is specified as 0.5mm, with an allowable deviation of -0.015mm. The nominal chemical composition of its positive electrode is platinum rhodium alloy, containing 30% rhodium and 70% platinum. The negative electrode is platinum rhodium alloy, containing 6% rhodium, hence it is commonly known as a double platinum rhodium thermocouple. The long-term use temperature of this thermocouple is 1600 ℃, and the short-term use temperature is 1800 ℃. See the figure below. Temperature measurement and tolerance: Thermocouple category code, division number, and limit temperature. The allowable temperature deviation is usually Δ t ℃ for platinum rhodium 30- platinum rhodium 6 WRR B 0~1800 0-1600 ± 1.5 ℃ or ± 0.25% t. Platinum rhodium 10 WRP S 0~1600 0-1300 ± 1.5 ℃ or ± 0.25% t