Why choose an RTD over a thermocouple?
- Accuracy and repeatability.
- Stability over time.
- RTD extension wire is less expensive - copper vs. thermocouple wire.
RTD sensors are more accurate and have higher repeatability compared to thermocouple sensors. That being said, thermocouples are the best choice when:
- The temperature is above 1,100°F (593°C).
- A grounded or exposed thermocouple junction has a faster response time than an RTD.
- Generally, thermocouples are less expensive.