Here are some key differences between RTD temperature sensors and thermocouples: RTD Temperature SensorsThermocouplesHigher accuracy and repeatability; Smaller temperature range; Less susceptible to EMI; More stable over time and exhibit less drift; Require a stable, regulated power source to operate; Can be more expensive;Wider temperature range; Can operate in harsher environments; Do not require a power source to operate; Can be less expensive; More susceptible to EMI; Can exhibit more drift and require frequent calibration; Read more about: RTD Working Principle & Thermocouple Working Principle