The composition of platinum-rhodium thermocouple mainly can be divided into

In industrial platinum rhodium thermocouple, platinum rhodium wire mainly can be divided into: R, S type and B type three, and platinum rhodium thermocouple can also be called in the state of high temperature, thermocouple, the thermocouple should all is understood, is specially used for temperature measurement equipment, can according to different pure metal material for the different combination of closed loop, if two different kinds of metal materials, the temperature differences are connected at both ends, you will emerge in the situation of the electric potential, this is the so-called seebeck electric potential, the composition of the main contact electric potential of electric potential and temperature difference of two kinds.

the advantage of platinum-rhodium thermocouple is: because of its own temperature measurement accuracy is very high, and stable performance is very good, so the temperature measurement temperature range is wider, effectively prolong its service life, because in the limit of temperature measurement on belongs to the relatively high, so is suitable for use in a inert and oxidizing atmosphere, but also can compare the use of short term in a vacuum. Platinum-rhodium thermocouple disadvantage is: weakness is platinum rhodium thermocouple is not suitable for use in, containing vapor in the atmosphere, reducing metal and nonmetal, mainly because of platinum-rhodium thermocouple, platinum rhodium wire belong to platinum base and binary alloy containing rhodium, so it should belong to precious metals, if is used at high temperatures, the serious decline, on the strength of the mechanical and for pollution is also very sensitive, there is precious metal material is the price more expensive, so as a one-time investment, so the cost increased a lot.