What are the differences between thermocouples and thermistors?

What are the differences between thermocouples and thermistors?

Thermocouples and thermistors are both temperature sensors, but they operate on different principles. Thermocouples generate a voltage based on the temperature difference between two junctions of different metals, while thermistors change their resistance with temperature changes. This leads to different applications and accuracy levels.

Can you explain their applications?

Sure! Thermocouples are often used in high-temperature environments, like furnaces and engines, due to their wide temperature range. Thermistors, on the other hand, are more commonly used in applications requiring precise temperature measurements, such as in medical devices and HVAC systems.

Which one is more accurate?

Thermistors are generally more accurate than thermocouples, especially in a limited temperature range. They can provide precise readings, while thermocouples may have a larger margin of error, particularly at extreme temperatures.

Are there any disadvantages to using thermistors?

Yes, thermistors have a limited temperature range compared to thermocouples and can be less stable at high temperatures. They also require more complex circuitry for signal processing.