How to choose a model for an industrial thermocouple

The following aspects should be paid attention to when selecting a model for industrial thermocouples: the nature and state of the measurement object, the selection of thermocouples for moving objects, vibration objects and temperature measurement of high-pressure vessels need to have high mechanical strength, and chemically polluted environments need to protect the tube , and in the case of electrical interference, the insulation requirements are higher. Choice of Durability and Thermal Responsiveness Thermocouples with large wire diameter have good durability, but the response speed is slow. For thermocouples with large heat capacity, the response speed is slow and the measurement speed is slow. When the temperature is high, the temperature control is poor in the case of temperature control. A fast response time is required and some degree of durability is required. It is more appropriate to choose an armored thermocouple. The selected atmosphere S type, B type and K type thermocouples are suitable for strong oxidizing and weak reducing atmospheres, while J and T type thermocouples are suitable for weak oxidizing and reducing atmospheres, if the air tightness is better When the temperature is between 1300-1800°C and the accuracy is high, the B-type thermocouple is usually used, the accuracy is not high, and the atmosphere is required. It also allows the use of tungsten rhodium thermocouples. Tungsten hen thermocouples are usually used above 1800°C. High-precision S-type thermocouples and N-type thermocouples are available at 1000-1300°C. Type K is usually used below 1000°C. Thermocouples and N-type thermocouples typically use E-type thermocouples below 400°C. T-type galvanic couples are typically used for 250°C and negative temperature measurements. T-type thermocouples are stable and highly accurate at low temperatures.

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