The platinum-rhodium thermocouple is a traditional temperature measuring element with stable thermoelectric performance and strong oxidation resistance, and is suitable for continuous use in oxidative and inert atmospheres. The long-term use temperature is 1600°C, and the short-term use temperature is 1800°C. The quality of platinum-rhodium thermocouples is reliable and the detection is guaranteed. Platinum-rhodium is a traditional temperature measuring element with stable thermoelectric performance and strong oxidation resistance. The long-term use temperature is 1600 °C, and the short-term use temperature is 1800 °C. The platinum-rhodium thermocouple adopts the high-purity platinum-rhodium alloy wire in the 99 corundum protective sleeve, which has high temperature resistance, accurate temperature measurement and high precision. Tungsten-rhenium thermocouples are high temperature thermocouples. It has the advantages of good temperature-potential linear relationship, reliable thermal stability and low price. Matched with the display instrument, it can directly measure the temperature of liquid, steam and gas medium. It can partially replace platinum-rhodium thermocouples as high-tech metallurgical industry, high-temperature electronic thermoelectric system structural engineering and space vehicles, and ultra-high temperature measurement tools for nuclear reactors. The relationship between the thermoelectric potential of the tungsten-rhenium thermocouple and the temperature conforms to the ZBN05003-88 graduation table, which is equivalent to the ASTME696-84 standard. In vacuum, reducing and inert atmosphere, it can be used in the range of 0~2300℃. Tungsten-rhenium couples with special protection tubes can also be used for a long time in an oxidizing atmosphere at 1600 °C, and their price is lower than that of platinum-rhodium thermocouples.
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