The relationship between thermoelectric potential of thermocouple and temperature

Thermocouple calculation from millivolt to temperature: Measure the cold junction temperature, convert it to the corresponding millivolt value, and add the millivolt value of the thermocouple to calculate the temperature. From temperature to millivolt: Measure the actual temperature and the cold junction temperature, convert them to millivolt values, and subtract the millivolt value to get the temperature. The thermoelectric potential of the thermocouple: 1: The thermoelectric potential of the thermocouple is the difference between the temperature functions of the two ends of the thermocouple, not the function of the temperature difference between the cold and working ends of the thermocouple; 2: the thermoelectric generated by the thermocouple When the material of the thermocouple is uniform, it has nothing to do with the length and diameter of the thermocouple. 3: When the material composition of the two thermocouple wires of the thermocouple is determined, the thermoelectric potential of the thermocouple is only related to the thermocouple The temperature difference is related; if the temperature of the cold junction of the thermocouple remains constant, the thermoelectric potential of the thermocouple is only a single value function of the temperature of the working end. The thermocouple welds two conductors or semiconductors A and B of different materials to form a closed loop, as shown in the figure. When there is a temperature difference between the two attachment points 1 and 2 of the conductors A and B, an electromotive force is generated between the two, thus forming a large current in the loop. This phenomenon is called the thermoelectric effect. Thermocouples use this effect to work. Regarding the thermoelectric potential of the thermocouple, we need to follow the above precautions to grasp it, which is a guarantee to ensure its normal operation. We are a professional manufacturer of thermocouples and provide you with an instrument that is very suitable for you. Ensure that the price is lower at the same quality, and the quality is better at the same price.

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