K-type thermocouple is a kind of temperature sensor. K-type thermocouple is usually used with display instrument, recording instrument and electronic regulator. K-type thermocouple is usually composed of main components such as temperature sensing element, installation fixture and junction box.

The K-type thermocouple is used as a temperature sensor. The K-type thermocouple is usually used with display instruments, recording instruments and electronic regulators. K-type thermocouples can directly measure the surface temperature of liquid vapor and gaseous media and solids in various production ranges from 0℃ to 1300℃.

K-type thermocouple is the cheapest metal thermocouple with the largest consumption at present, and its consumption is the sum of other thermocouples. The diameter of K-type thermocouple wire is generally 1.2mm～4.0mm.

The nominal chemical composition of the positive electrode (KP) is: Ni:Cr=90:10, the nominal chemical composition of the negative electrode (KN) is: Ni:Si=97:3, and its operating temperature is -200℃~1300℃.

K-type thermocouple has the advantages of good linearity, large thermoelectromotive force, high sensitivity, good stability and uniformity, strong oxidation resistance, and low price. It can be used in oxidizing inert atmosphere and widely used by users.

K-type thermocouples cannot be directly used in sulfur, reducing or reducing, oxidizing alternate atmospheres and vacuum at high temperatures, also dont recommended for use in weakly oxidizing atmospheres.