Summary of thermocouple, thermocouple, thermocouple, thermocouple with a slender, flexible, fast thermal response time, resistance to vibration, high temperature resistance, compressive strength and durability, etc. It can be used for temperature measurement directly, also can be used as the inner core components fabricated thermocouple, thermocouple, beads to replace the traditional porcelain shell element. Product is especially suitable for narrow between pipeline installation, bending and require rapid response, miniaturization and special temperature measuring occasions. Products applicable to the Ann and flame-proof occasions, widely used in petroleum, chemical industry and so on production site with occasions of various kinds of flammable, explosive gas, steam. Thermocouple, thermocouple structure principle of thermocouple, thermocouple by thermal components ( Thermocouple) , fuses, junction box and a variety of purposes of fixture, a single and double component two specifications. Thermocouple temperature measurement principle: the heated metal wire resistance with the change of temperature change, the thermocouple value R ( t) Its relations can be expressed as: the temperature t of R ( t) ＝R0( 1+At+Bt2+……) , according to the measured resistance value is indexing table corresponding to measured temperature t. Thermocouple temperature measurement principle: two different types of metal or alloy wire A, B, called hot electrode, welding is called at the end of the measurement, connect the two ends of the display instrument called the reference side, when the temperature of the measuring end and reference end is not at the same time, can produce thermoelectric potential EAB ( t, t1) 。 When the t1 = 0 ℃ are: the EAB ( t, 0) ＝EAB( t) ＝f( t) Characteristics of thermocouple, thermocouple, thermocouple, thermocouple can have a variety of materials outside of the cases, full of high-density oxide material inside insulation, strong pollution resistance and excellent mechanical strength, suitable for installation in harsh environment. Thermocouple, thermocouple, main technical parameters of thermocouple index number: Pt100, Cu50 measuring range: Pt100: - 200～500℃ Cu50：- 50～150℃