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S type single platinum-rhodium thermocouple the advantages and disadvantages of _ instrument

by:JVTIA     2020-10-29
S type single platinum-rhodium thermocouple specifications: for precious metals thermocouple. Accidentally wire diameter provision of 0. 5 mm, allowable deviation - 0. The positive (015 mm, SP) In the name of the chemical composition of platinum rhodium, contain the rhodium is 10%, platinum-based is 90%, the cathode ( SN) For pure platinum, commonly known as single platinum-rhodium thermocouple. The temperature is 1300 ℃, the long-term use of thermocouple short-term use temperature is 1600 ℃. S single platinum-rhodium thermocouple advantages: high accuracy, good stability, test your area wide, long service life, etc. Its physical and chemical performance is good, the thermoelectric potential stability and oxidation resistance at high temperature performance is good, suitable for oxidizing and inert atmosphere. Because of S type thermocouple has excellent comprehensive performance, in line with the use of S type thermocouple temperature scale, for a long time as a scale interpolation instruments, 'ITS - Although 90 'provisions will not be as within the scale of the instrument, but temperature advisory committee ( 有条件现金转移支付) S type thermocouple can still be used for approximate to realize international temperature scale. S type single platinum-rhodium thermocouple: is the thermoelectric potential, thermoelectric potential rate is small, low sensitivity and mechanical strength under high temperature to drop, is sensitive to pollution, expensive precious metals, and one-time investment is larger. Commonly used product is metallurgy, glass manufacturing industry.
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