End of thermocouple has general thermocouple and common structure, generally by thermocouple, thermocouple wire and display instrument, etc. But must pay attention to the following two thermocouples and digital display table index number must agree to changes in the thermocouple lead resistance, must adopt three wire system connection using considerations ( 1) It is important to note that end thermocouple to use three wire connection, such can eliminate the impact of connecting wire resistance change. ( 2) End thermocouple temperature sensing element resistance wire winding by special processing, close to the face in the thermometer. Compared with general axial thermocouple, it can reflect more correctly and quickly end face of the actual temperature being measured, is suitable for measuring temperature bearing and other parts of the face. ( 3) By special processing wire end thermocouple element ( Copper or platinum wire) Winding, they are tight in the thermometer front and compared with general axial thermocouple, end thermocouple can more correctly and quickly reflect the actual temperature condition of the end face being measured, the method of making it a lot, varieties of forms, suitable for power plant steam turbine and motor bearing shell or other body surface temperature measurement. ( 4) Some end thermocouple installation because it fuses with the resistance element is connected, so will lead to end surface thermocouple synchronous rotation, such ability make sure end thermocouple in the installation is not artificial damage, but the actual installation process to avoid appear this kind of circumstance. ( 5) End thermocouple outside the installation time only need to twist the screw is ok, don't need to lead and end surface thermocouple synchronous rotation.