How is the current and voltage of a thermocouple calculated

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What is a thermocouple?
How do thermocouples generate current and voltage?
What is the formula for calculating the current and voltage of thermocouples?
What is the unit of thermocouple current and voltage?
What are the measurement methods for thermocouple current and voltage?
What are the application areas of thermocouple current and voltage?
What is a thermocouple?
Thermocouples are sensors used to measure temperature. It is composed of two different metal wires, which are welded together at a point to form a hot solder joint, and the other two ends are connected to temperature measuring instruments. The working principle of thermocouples is based on the thermoelectric effect. When the solder joints and temperatures of two types of wires are different, a potential difference will be generated, resulting in the generation of current.
How do thermocouples generate current and voltage?
When the two solder joints of a thermocouple are different from the ambient temperature, a temperature gradient will occur between the two metal wires, resulting in a potential difference between the two solder joints. This is because the electronic cloud structure and thermal vibration characteristics of different metal wires are different, causing electrons to drift under temperature gradients, forming a potential difference and generating current.
What is the formula for calculating the current and voltage of thermocouples?
The formula for calculating the current and voltage of thermocouples is: V= α* (T2-T1)
Among them, V is the current voltage, α The thermoelectric coefficient of the thermocouple, T2 is the measurement point temperature of the thermocouple, and T1 is the reference temperature.
What is the unit of thermocouple current and voltage?
The unit of thermocouple current voltage is millivolts (mV).
What are the measurement methods for thermocouple current and voltage?
There are two main methods for measuring the current and voltage of thermocouples: using professional thermocouple instruments for measurement, or using a multimeter to measure the voltage value and then convert it for calculation.
What are the application areas of thermocouple current and voltage?
The application fields of thermocouple current and voltage are very extensive, and common applications include temperature sensors, heat treatment equipment, boiler temperature control, aerospace, etc. Thermocouples can work stably in various environmental temperatures, with advantages such as high reliability and low cost.