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High Temperature Precious Metal Thermocouple

High Temperature Precious Metal Thermocouple
High temperature precious metal thermocouples, platinum rhodium with single platinum rhodium (platinum rhodium 10 - platinum rhodium) and double platinum rhodium (platinum rhodium 30 - platinum rhodium 6), they are used as temperature measuring sensors, usually with temperature transmitters, regulators And the display instrument and other supporting use, constitute a process control system to directly measure or control the temperature of the fluid, steam and gas medium and solid surface in the range of 0-1800 °C in various production processes.
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High temperature precious metal thermocouple


High temperature precious metal thermocouples, platinum rhodium with single platinum rhodium (platinum rhodium 10 - platinum rhodium) and double platinum rhodium (platinum rhodium 30 - platinum rhodium 6), they are used as temperature measuring sensors, usually with temperature transmitters, regulators And the display instrument and other supporting use, constitute a process control system to directly measure or control the temperature of the fluid, steam and gas medium and solid surface in the range of 0-1800 °C in various production processes.

High temperature precious metal thermocouple

Industrial high-temperature precious metal thermocouples are used as sensors for measuring temperature, and are usually used in conjunction with display instruments, recording instruments, and electronic regulators. It can directly measure the surface temperature of liquids, vapors and gaseous media and solids in the range from 0 °C to 1800 °C in various production processes. According to national regulations, our factory has been producing platinum iridium 30-platinum iridium 6, platinum iridium 10-platinum, nickel chrome-nickel silicon, nickel chrome-copper nickel, copper-copper nickel in accordance with IEC international standard graduation number since 1987. Types of thermocouples such as iron-copper and nickel shall comply with the JB/T9238-1999 standard.

High temperature precious metal thermocouple

High temperature resistant 1800 ° C for precious metal thermocouples. The diameter of the filament is specified to be 0.5 mm, the allowable deviation is -0.015 mm, and the nominal chemical composition of the positive electrode (BP) is a platinum-rhodium alloy containing 30% of yttrium, 70% of platinum, and a platinum-rhodium alloy of the negative electrode (BN). The content of bismuth is 6%, so it is commonly called double platinum ruthenium thermocouple. The thermocouple has a long-term maximum operating temperature of 1600 ° C and a short-term maximum operating temperature of 1800 ° C.

High temperature precious metal thermocouple, high temperature resistant 1800 °C main technical parameters:

    Electrical outlet: M20x1.5, NPT1/2

    Accuracy level: I, II

    Protection level: IP65

    Even wire diameter: Φ0.5

    Nominal pressure: atmospheric pressure

High temperature precious metal thermocouple

Platinum rhodium 30-platinum rhodium 6 thermocouple:


The platinum rhodium 30-platinum rhodium 6 thermocouple is a noble metal thermocouple. The diameter of the filament is specified to be 0.5 mm, the allowable deviation is -0.015 mm, and the nominal chemical composition of the positive electrode (BP) is a platinum-rhodium alloy containing 30% of yttrium, 70% of platinum, and a platinum-rhodium alloy of the negative electrode (BN). The content of bismuth is 6%, so it is commonly called double platinum ruthenium thermocouple. The thermocouple has a long-term maximum operating temperature of 1600 ° C and a short-term maximum operating temperature of 1800 ° C.


The high temperature precious metal thermocouple has the highest accuracy, the best stability, the wide temperature range, long service life and high temperature limit in the thermocouple series. It is suitable for use in oxidizing and inert atmospheres, but also in short-term use in vacuum, but not in reducing atmospheres or in metal or non-metal vapor atmospheres. An obvious advantage of the Type B thermocouple is that it does not require compensation with a compensation wire because the thermoelectric potential is less than 3 μV in the range of 0 to 50 °C.


The shortcomings of high temperature precious metal thermocouples are thermoelectric potential, small thermoelectric potential rate, low sensitivity reading, low mechanical strength at high temperature, very sensitive to pollution, expensive precious metal materials, and therefore a large one-time investment.


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