Platinum rhodium thermocouple, also called precious metal thermocouple, as a temperature measurement sensor is usually used with temperature transmitter, regulator and display instrument, etc., to form a process control system, used to directly measure or control the temperature of fluid, steam and mheán gáis agus dromchla soladach laistigh den raon 0-1800C i bpróisis táirgthe éagsúla.