The advantages and disadvantages of platinum-rhodium thermocouple

Platinum-rhodium thermocouple advantage is that it has the wide [measurement area, and platinum rhodium thermocouple on the service life is very long, the accuracy and stability is also very good, because platinum rhodium on the oxidation resistance performance is good, even in the oxidizing and inert, and can use the same vacuum environment, platinum rhodium thermocouple also has a special advantage, just don't need to compensate for the use of wires.

platinum-rhodium thermocouple, of course, there are also disadvantages, the downside is that the sensitivity is lower, and thermoelectric potential rate is very small, if it is under the condition of relatively high mechanical strength is difficult to achieve a better level, platinum, rhodium thermocouple mainly adopts the platinum, rhodium, and other metal manufacturing, and on the manufacturing cost is higher than other thermocouple, materials for the environment pollution is also more sensitive, so need higher levels in investment company. Actually platinum-rhodium thermocouple can also be divided into double platinum rhodium thermocouple and single platinum-rhodium thermocouple two kinds, the main function is effective to obtain the temperature of the measured object, and platinum rhodium thermocouple will more often and temperature transducer and display instrument and temperature regulator and other equipment, for supporting the use of effective formed the automation control system, can be directly measured and control, need to measure the temperature of the different production process.