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Ceramic Thermocouple - Items tagged as "Highest-temperature-thermocouple"
Thermocouplesprotected with Ceramic tubes or insulators provides solutions for HighTemperature applications along with reducing or vacuum atmospheres. Typically the thermocouples in these environments are Type R, S, B, C, K or N.
Type B andCthermocouples are used at 2700°F (1480°C) and higher.
Type B platinum based thermocouples can operate up to 3,092°F (1700°) and works in air or oxidizingenvironments, although are sensitive to contamination from a furnace and/or materials being processed.
Type B sensors must be in vacuum-tight assemblies filled with air in a vacuum or reducing environment. The ceramic tube protection material must be compatible with the environment.
Type C tungsten rhenium thermocouples are for extreme high temperatures up to 4,200°F (2315°C), they work well in vacuum, hydrogen, or inert atmospheres, although will fail very quickly in air at high temperatures.
Type RandS thermocouples are typically used at 2000°F (1100°C) and Higher temperatures up to 2700°F (1480°C)
Type R and S also work well in air and have the same conditions as Type B with contamination, and subject to deterioration in vacuum or reducing environments
Type R has 3% more Rhodium and it offers improved stability and a slightly higher temperature range than Type S. It also has 15% more milivolt ouput.
Type K andNthermocouples are used up to 2000°F (1095°C) andcan work in both a vacuum and inert atmospheres. Both are sensitive to reducing atmospheres, an must be protected when using a process gas such as hydrogen.
Type K and N thermocouples operating in vacuum at high temperature for extended periods can become inaccurate due to vaporization of chrome from the positive leg.
Type K and N thermocouples are less expensive than the platinum based Type R, S and B along with the tungsten rhenium based Type C.