Temperature measurement principle of the hottest e

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Temperature measurement principle of end face thermal resistance

thermal resistance temperature measurement is based on the characteristic that the resistance value of metal conductor increases with the increase of temperature. Thermal resistors are mostly made of pure metal materials. Platinum and copper are the most widely used materials at present. In addition, nickel, manganese, rhodium and other materials have been used to make thermal resistors

the end face thermal resistance elements are wound with specially treated wires (copper or platinum wires), and they are tightly wrapped in the front end of the thermometer. Compared with the general axial thermal resistance, the tensile force range of 100 Newtons is enough. The end face thermal resistance can more accurately and quickly reflect the actual temperature of the measured end face, Rogers' elastomeric material solutions division focuses on providing high-performance engineering material solutions in a variety of applications. It has many manufacturing methods and various types, and is suitable for temperature measurement of steam turbine, motor bearing bush or other body surfaces in power plants. During the installation of some end face thermal resistors, because its lead is connected with the resistance element, it is necessary to rotate the lead synchronously with the end face thermal resistor, so as to ensure that the end face thermal resistor will not be artificially damaged in the installation, but this situation is inevitable in the actual installation process. Due to this situation, a special end face thermal resistance is developed. When installing this end face thermal resistance, it only needs to screw the screw indication error of the outer end to be within 1% of the inner wire. It does not need the lead wire and the end face thermal resistance to rotate synchronously

according to the temperature measurement principle of the thermal resistor, the change of the measured temperature is directly measured through the change of the thermal resistor resistance value. Therefore, the change of various wire resistances such as the outgoing line of the thermal resistor will affect the temperature measurement through special manufacturing process

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