The advantages and disadvantages of platinum-rhodium thermocouple and working medium

Platinum rhodium thermocouple is that it has the advantages of wide, especially high [area measurement, and platinum rhodium thermocouple on the service life is very long, accurate performance is also very high and very stable, because platinum rhodium on antioxidant performance is very good, whether in the vacuum of inert or oxidizing environment can be used, and platinum rhodium thermocouple has another characteristic, is don't need to use any compensating lead wires.

platinum-rhodium thermocouple, of course, also there are a lot of shortcomings, shortcoming lies in its hot spot rate is small, its sensitivity is very low, if it is used under the high mechanical strength, more difficult to perform a higher level of measurement, platinum, rhodium thermocouple mainly adopted made platinum, rhodium and other precious metals in combination with a thermocouple, not only the cost of manufacture is higher, the material on the pollution is also very sensitive, so the need for a large amount of investment. Platinum-rhodium thermocouple can also be divided into double platinum rhodium thermocouple and single platinum-rhodium thermocouple, but the main effect of these two kinds of platinum-rhodium thermocouple, can be directly to obtain the temperature of the measured object, and platinum rhodium thermocouple is often and temperature regulator, display of all facilities, such as instrument and temperature transmitter, effective complete the automation control system, can directly control and measurement of the temperature in the production of various needs.