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Anhui Weite Instrument Cable Co., Ltd. has been focusing on R & D and production of thermocouple instrument cable for 15 years, which is trustworthy

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Platinum rhodium thermocouple

Type B double platinum rhodium (platinum rhodium 30 platinum rhodium 6) thermocouple

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Type B double Platinum rhodium thermocouple Also known as platinum-30 rhodium thermocouple
 Type B double platinum rhodium thermocouple
The positive electrode of the thermocouple is platinum rhodium alloy containing 30% rhodium, and the negative electrode is platinum rhodium alloy with rhodium content of 6%. At room temperature, its thermal potential is very small, so it is not necessary to compensate the lead wire in the measurement, so the influence of cold junction temperature change can be ignored; the long-term service temperature is 1600 ℃, and the short-term temperature is 1800 ℃. Because of the small thermoelectric potential, it is necessary to use a display instrument with high sensitivity.

Type B thermocouple is suitable for use in oxidizing or neutral atmosphere, and can also be used in vacuum for a short time; even in reducing atmosphere, its life is 10-20 times of R or S type; because its electrodes are made of platinum It is made of rhodium alloy, so it does not have all the disadvantages of the negative electrode of Platinum Rhodium Platinum thermocouple. It has a large tendency of crystallization at high temperature, and has large mechanical strength. At the same time, because it has less influence on the absorption of impurities or the migration of rhodium, its thermoelectric potential change is not serious after long-term use, and its disadvantages are expensive (compared with single platinum rhodium).

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