Thermocoupleis a commonly used temperature measuring element in temperature measuring instruments, it directly measures temperature and converts temperature signal into thermoelectromotive force signal. They are a widely used type of temperature sensor for measurement and control and can also be used to convert a temperature gradient into electricity.
So how to choose a suitable thermocouple from the measurement accuracy and temperature measurement range? Let’s take a look today.
1. When the operating temperature is 1300~1800℃, and the accuracy is required to be relatively high, the B-type thermocouple is generally used.
2. The accuracy is not high, and the atmosphere allows the use of tungsten-rhenium thermocouples. Above 1800 °C, tungsten-rhenium thermocouples are generally used.
3. The use temperature is 1000~1300℃, which requires high precision and relatively high available S-type thermocouple and N-type thermocouple.
4. K-type thermocouples and N-type thermocouples are generally used below 1000 °C.
5. E-type thermocouples are generally used below 400°C.
6. T-type galvanic couples are generally used for measurement at 250°C and negative temperature. T-type thermocouples are stable and have high accuracy at low temperatures.
