By pressing the spring, the end of the thermocouple is tightly attached to the surface of the measured object to improve the reliability and accuracy of the measurement. Used in conjunction with display instruments, it can directly measure temperatures in the range of 0-400 degrees. Thermocouples are equipped with flexible extension wires that can bend freely, have small time constants, and are easy to use. Suitable for industries such as plastic extruders, light textiles, and food. Structural principle: The working principle, indexing characteristics, and allowable deviation of WRET-01 thermocouple, as well as temperature compensation for the free end (cold junction). And the connection method with the display measuring instrument is the same as that of a general thermocouple. The structure of WRET-01 thermocouple consists of a protective tube, installation bolts, locking sleeves, springs, and thermocouple wires. Installation method: The installation method of WRET-01 thermocouple is shown in the figure. It is fixed and installed on the tested object. First, tighten the connecting bolts on the tested object, then tightly attach the thermocouple to the tested object, tighten the clamp screw, and finally tighten the locking clamp.

As a temperature sensor, K-type thermocouples are usually used in conjunction with display instruments, recording instruments, and electronic regulators. K-type thermocouples can directly measure the surface temperature of various liquid vapors, gas media, and solids in the production range from 0 degree to 1300 degree . K-type thermocouples typically consist of main components such as temperature sensing elements, installation fixtures, and junction boxes. Nickel chromium thermocouple (K-type thermocouple) is currently the most commonly used cheap metal thermocouple, which is the sum of other thermocouples. The diameter of K-type thermocouple wire is generally 1.2-4.0mm. The nominal chemical composition of the positive electrode (KP) is Ni: Cr=92:12, and the nominal chemical composition of the negative electrode (KN) is Ni: Si=99:3. Its operating temperature is -200-1300 degree . K-type thermocouples have advantages such as good linearity, high thermoelectric electromotive force, high sensitivity, good stability and uniformity, strong antioxidant performance, and low cost. They can be used in oxidizing inert atmospheres. Widely adopted by users. K-type thermocouples cannot be directly used at high temperatures in atmospheres with alternating sulfur, reduction, or oxidation, and in vacuum. They are also not recommended for use in weakly oxidizing atmospheres