Frequently Asked Questions - Temperature Sensors

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1. Which type of temperature sensor is more accurate—a thermocouple or an RTD?

RTD sensors. While the actual rate of accuracy depends on temperature, the range for a thermocouple is generally 1-2°, while the range for an RTD sensor is around 0.5°. However, there are some limitations to RTD sensors. For more information regarding which sensor would be more applicable to your specific needs, please call 1-800-884-4967.

2. What is the difference between thermocouples and RTD's?

RTD sensors are based on the resistance change of (platinum) versus temperature change. Thermocouples are based on two dissimilar metals which, when joined, will give a mV signal proportional to—and changing with—temperature.