Methods for distinguishing between PT100 and thermocouples

What are PT100 and thermocouples?
PT100 is a commonly used temperature sensor that operates based on the principle that resistance changes with temperature. A thermocouple is another type of temperature sensor that determines temperature by measuring the voltage generated based on the thermoelectric effect between two different metals.
How do they work differently?
The working principle of PT100 is based on the temperature coefficient of platinum resistance. As the temperature changes, the resistance value will also change. By measuring the change in resistance, we can determine the change in temperature.
The working principle of a thermocouple is based on the thermoelectric effect between two different metals. When there is a temperature difference between the connection points of two different metals, an electromotive force is generated. By measuring this electromotive force, the temperature change can be determined.
3. What is the difference in their measurement range?
Generally speaking, the measurement range of PT100 is relatively wide, ranging from -200 ° C to 850 ° C. The measurement range of thermocouples is also very wide, generally ranging from -200 ° C to 1800 ° C.
What are the differences between them?
In general, the pt100 is relatively high and can reach around 0.1 ° C. Thermocouples are generally lower in temperature and can reach around 1 ° C.
What are the differences in their applicable scenarios?
Due to its high reliability, PT100 is particularly suitable for situations that require temperature measurement, such as laboratories and medical equipment.
Thermocouples are more common in industrial production and other fields due to their wide measurement range and ability to work well even in situations with rapid temperature changes.
What is the price difference between them?
Due to the high demand for platinum as a material, PT100 is relatively expensive. Thermocouples, on the other hand, are relatively inexpensive and more cost-effective.
Through the above answers, we can clearly distinguish some differences between PT100 and thermocouples. When choosing to use temperature sensors, the appropriate sensor can be selected based on specific needs.