What is a platinum rhodium wire, who can explain? Platinum rhodium wire is the thermocouple wire thermocouple inside, there are mainly S, R, B type. S type thermocouple in the thermocouple series with great accuracy, safe sex, measure your area wide, long use fixed number of year of survival advantage. Chemical performance is satisfactory, R type thermocouple thermoelectric potential safe sex and oxygen resistance at high temperature performance is good, suitable for use in oxygen and inert atmosphere. B type thermocouple don't need to repay the conductor to repay, and use fixed number of year to live long, temperature limit higher strengths.