May I ask at what temperature range is RTD generally used by everyone?
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I work in the chemical industry. What temperature range do people usually use RTDs at? At what temperature above a certain value is it necessary to use a thermocouple? I think a thermocouple is needed when it’s above 200 degrees, right? I’m a beginner; please give me some advice! :)
Generally, that’s the case. However, when using it, various factors need to be taken into consideration, such as the installation location and the medium being measured. In some of our factory’s measurement applications where temperatures are below 200 degrees, thermocouples are also used. The measurement range of the Pt100 thermistor is -200~850°C, and it functions properly for measurements below 650°C.
The temperature range for Pt100 is -200 to 850, but it depends on the type of thermistor you are using! For values over 350, TC is generally used!
First, please let LZ understand that the applications of thermocouples and thermal resistors are not determined by the level of temperature they measure! The actual conditions on site need to be taken into comprehensive consideration. Please describe the operating conditions under which the measurement was taken, and we will analyze them together.
The temperature range for Pt100 is -200~550°C.
Generally, using a thermal resistor is fine below 400°C
If the ambient temperature at the temperature measurement point is relatively high, it’s better to use a thermocouple
Based on experience, RTDs work well at temperatures below 350°C, with no significant impact on the service life of the resistive element.
RTDs are generally used to measure temperatures below 800°C; for higher temperatures, thermocouples are required.
Use a thermal resistor for values below 650, and a thermocouple for values above 650.
Highly recommended for use below 500 degrees.
We generally use 300 degrees as the boundary.
We generally use 400 as the threshold: thermal resistors are used for temperatures below 400 degrees, while thermocouples are used for temperatures above 400 degrees!
We usually keep it below 300 degrees
:For the handshake process, it’s time for me to start working on the design. There aren’t many options available; I just base my decisions on past experiences. It seems that the temperature range of -200 to +800 degrees is mentioned only in the technical documentation provided by suppliers. However, we also need to consider reliability and long-term usage. So, when the temperature is high, it’s better to use heat exchange thermocouples. I really would like to hear the opinions of the engineers who are responsible for maintenance at the factory
I strongly agree with what was said on the fourth floor: it depends on the medium and the temperature; in my opinion, thermocouples should still be used when the temperature exceeds 400
I remember seeing that there; it seems that thermocouples require compensation, while thermal resistors are more convenient. Different models can be chosen depending on the ambient temperature, covering ranges from -50 to 1600°C, and special versions can reach ranges from -269 to 2800°C.