What is a platinum rhodium thermocouple

What is the platinum rhodium thermocouple platinum-rhodium thermocouple is also called high-temperature thermocouple, precious metals are divided into three types: S type thermocouple ( Platinum rhodium - 10 Platinum thermocouple) , R type thermocouple ( Platinum rhodium - 13 Platinum thermocouple) And B type thermocouple ( Platinum rhodium - 30 Platinum rhodium thermocouple 6) , mainly divided into single platinum rhodium and platinum rhodium, suitable for all kinds of high temperature occasion, widely used in glass, ceramics and industrial salt bath furnace, etc. The temperature field in the process of production. The S type thermocouple is the current domestic industrial * for the used one. Because temperature is higher, generally stainless steel protecting tube high temperature can only be up to 1000 degrees, resistant to over 1000 degrees stainless steel protecting tube is expensive, substitutes just jade ceramic protection tube, high purity alumina tube resistant to high temperature of 1600 degrees, defect is fragile. S type thermocouple ( Platinum rhodium - 10 Platinum thermocouple) : platinum rhodium thermocouple ( S type thermocouple) 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 thermocouple * long-term high temperature of 1300 ℃, short-term * high temperature of 1600 ℃. S type thermocouple in the series of thermocouple with 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 oxidation and inert atmosphere. Because of S type thermocouple has excellent comprehensive performance, in line with the international use of S type thermocouple temperature scale, has for a long time as an international scale interpolation instruments, 'ITS - Although 90 'provisions will not be as the international scale of check meter inside, but the international advisory committee (temperature 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 thermocouple deficiency is thermoelectric potential, thermoelectric potential rate is small, low sensitivity and mechanical strength under high temperature to drop, is sensitive to pollution, precious metal materials is expensive, and one-time investment is larger. Dear customer: our company has a K type thermocouple and armoured thermocouple, tungsten-rhenium thermocouples products, you can call our company service special line over the web for more detailed product information, perfect service is our endless pursuit of the United States, welcome new and old customers trust our products of choose and buy, we will serve you wholeheartedly!