Thermocouple and end face temperature instrument what is the difference between the two kinds of thermocouple _ instrument

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. 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. Due to the emergence of this situation, chongqing instrument company strengthen scientific research developed special end thermocouple, the end surface thermocouple outside the installation time only need to twist the screw is ok, don't need to lead and end surface thermocouple synchronous rotation. From the thermocouple temperature measurement principle, the measured the change in temperature is directly measured by thermocouple resistance change, therefore, the wires of a thermocouple body such as a variety of wire resistance change will affect temperature measurement. Thermocouple is by thermal components ( The resistor body) , wire, insulation materials, stainless steel casing combination solid body, its diameter is generally from 2 to 8 mm, achieve more xiaoke phi is 0. 25mm。 Compared with conventional type thermocouple, it has the following advantages: (1) small volume, no internal air gap, thermal inertia, small measuring hysteresis; (2) good mechanical properties, resistance to vibration and shock. (3) can bend, easy to install (4) long service life. Thermocouple temperature measuring instrument is commonly used in temperature measuring element, is made up of two different components of the conductor when two ends synthesis loop, when the two junction thermocouple temperature is not at the same time, will produce thermal current in the circuit. If the work end of the thermocouple with the reference entity temperature difference, display instrument will indicate the thermocouple thermoelectric potential of the corresponding temperature value. Thermocouple is a kind of temperature sensor, it is smaller than the diameter of a prefabricated thermocouple, flexible, good vibration resistance, suitable for installation in the case of prefabricated thermocouple can't install, the company produces the thermocouple used to introduce thermocouple temperature measuring element, therefore, is accurate, sensitive, fast thermal response time, stable quality, long service life, etc.