Should I use a thermal resistor or a thermocouple? !
Thread Content
Generally, thermocouples are used at temperatures above 600 degrees, right? ! Thermistors are generally accurate, right? !
Thermal resistors offer higher precision, with less interference affecting the circuit. Thermocouples have a wider measurement range, but slightly lower accuracy; moreover, due to the mV signal, they are prone to interference. Thermocouples for high temperatures are also expensive.
It mainly depends on the temperature range; for medium and low temperatures, thermal resistors are sufficient, as they are inexpensive!
Well, the flue gas temperature is currently around 450 as measured by a thermistor, but the owner is using thermocouples; their flue gas outlet temperature should be above 500. So I’m wondering if there might be an issue with the thermistor !
Well, yeah, but at a moderate temperature of around 500 degrees, it gets a bit tricky!
Here, below 100 degrees it’s a thermal resistor, and above that it’s all thermocouples. . .
It is recommended to use thermocouples; thermal resistors can handle temperatures up to 600 degrees. However, the conditions on site are complex, and the quality of current thermal resistors varies greatly. They are prone to damage at high temperatures, which increases the need for repairs. Generally, thermocouples are recommended when the temperature exceeds 300 degrees
The specifications state that the upper temperature limit for Pt100 thermistors is 500 degrees
Thermal resistors are used for medium-temperature measurements, with a maximum measurement range generally not exceeding 500°C; thermocouples are used for high-temperature measurements, as temperatures of 600°C require the use of thermocouples. The measurement accuracy of thermal resistors is higher than that of thermocouples.
Okay, thank you. . . . .
What’s the price? ! ! Is it expensive?