Can I replace an RTD with a thermocouple?

1.Thermocouples and platinum resistors are both sensors for measuring temperature, but they have distinct designs and functions, making them suitable for different measurement requirements.

2. For situations where precision requirements are not strict, thermocouples are an economical and practical choice. In situations where higher precision is required, platinum resistors become a more suitable choice due to their stability.

3. Thermocouples are suitable for application scenarios that require frequent sampling, while platinum resistors are suitable for situations where the sampling frequency is not highly demanded.

4. The temperature measurement range of thermocouples varies by type, but each type has its specific temperature measurement interval. The standard measurement range of platinum resistance is from -200°C to 960°C.

5. The working principle of platinum resistance is based on the relationship between resistance value and temperature, while thermocouples measure temperature through the electromotive force generated by temperature changes.

6. Although thermocouples and platinum resistors can measure the same temperature point, they cannot be directly interchanged due to their different output signals.

7. To achieve the interchangeability of temperature measurement among different sensors, corresponding circuit conversions are required to adapt to different signal types.