About the platinum rhodium thermocouple related knowledge points is introduced Shanghai dragon instrument electric appliance co. , LTD

Platinum rhodium thermocouple feature is: hot wire electrode high melting point ( 3300℃） Extremely easily, low steam and oxidation; In the oxidizing atmosphere chemistry stability is good. Electromotive force is big, high flexibility, is mainly the price cheap. Current measurement of the temperature of 1600 ℃ above, the non-contact method is adopted, however, this kind of method of error is bigger, such as contact rules can accurately measure the true temperature. In high temperature thermocouple, precious metal thermocouple price expensive and high temperature can only be under 1800 ℃, and the platinum rhodium thermocouple is not high temperature limit, and good stability, therefore, platinum, rhodium thermocouple in metallurgy, building materials, aerospace, aviation and nuclear power industries have been widely used. The tungsten resources in China, local replace precious metal platinum-rhodium thermocouple price cheap, can the thermocouple ( Platinum rhodium thermocouple) 。 It is in the category of high temperature test is a way of measuring temperature data. Its high temperature can reach 2800 ℃, but, when higher than 2300 ℃, scattered data. Therefore, using around 2000 ℃ temperature well. Platinum rhodium thermocouple extremely easy oxidation, suitable for use in inert hydrogen or boring, or maintain with dense talents using separate it with oxygen. Cannot be used for carbon atmosphere ( As in the atmosphere containing hydrocarbons is applied, a temperature above 1000 ℃ or corrosion) 。 Tungsten or tungsten rhenium in carbon atmosphere is easy to generate stable carbides, which reduce its flexibility and provoked brittle fracture, under the condition of the existence of hydrogen, will accelerate carbonization. Platinum rhodium thermocouple oxidation problem is constantly at home and abroad scholars concern topic, and efforts in the discussion. Our company adopted the international advanced fabrication process, developed the victory fabricated platinum rhodium thermocouple of high temperature and high pressure, the temperature of the product range of 0 ~ 1800 ℃, widely used in metallurgy, coking, chemical industry furnace, heat treatment, glass, etc.