How much thermoelectric electromotive force can a K-type thermocouple generate for each degree of heating?

To know how much thermoelectric electromotive force a K-type thermocouple can generate, one must first understand the working principle of the thermocouple.
The working principle of a thermocouple: Two conductors with different compositions (called thermocouple wires or thermoelectric electrodes) are connected at both ends to form a circuit. When the temperature at the junction is different, an electromotive force is generated in the circuit, which is called the thermoelectric effect, and this electromotive force is called the thermoelectric potential. Thermocouples use this principle for temperature measurement, and the end directly used for measuring the temperature of the medium is called the working end (also known as the measurement end), The other end is called the cold end (also known as the compensation end); The cold end is connected to the display instrument or supporting instrument, and the display instrument will indicate the thermoelectric potential generated by the thermocouple. A thermocouple is actually an energy converter that converts thermal energy into electrical energy and measures temperature using the generated thermoelectric potential.
K-type thermocouples are commonly used in conjunction with display instruments, recording instruments, and electronic regulators. K-type thermocouples can directly measure the surface temperature of liquids, vapors, gas media, and solids in the range of 0 ℃ to 1300 ℃ in various production processes. K-type thermocouples typically consist of main components such as temperature sensing elements, installation fixtures, and junction boxes.
The comparison relationship between the temperature value and thermoelectric potential of K-type thermocouples can generally be found through the K-type thermocouple graduation table, namely the K-type thermoelectric potential comparison table. Through the table, it can be seen that the thermoelectric potential of K-type thermocouples varies slightly in different temperature ranges for each degree of heating, generally around 0.042 and 0.041 mV.