Thermocouple temperature measuring element is a common thermocouple, the following is a detailed introduction about it: the working principle of the seebeck effect: Two conductors (or semiconductors) of different composition A and B form a closed loop, and when the two contact points 1 and 2 are at different temperatures T1 and T2, an electromotive force is generated in the loop, this phenomenon is called the Seebeck effect, and the electromotive force is called the thermoelectric motive force. The size of the thermoelectric motive force is related to the material of the two conductors and the temperature difference between the two contact points, and temperature can be calculated by measuring the thermoelectric motive force.

Structure: hot electrode made of two dissimilar metals or alloys materials, is a key part of the produce thermoelectric emfs, common nickel chrome – nickel silicon, platinum rhodium – the material such as platinum. Insulation casing: set outside the hot electrode, used to prevent two heat heat between electrode and electrode and short-circuit between the object to be tested, protection tube, usually in insulation materials such as ceramic, quartz. Heat pipe: protect electrode from mechanical damage, chemical corrosion, etc. The influence of external factors, guarantee the normal work of the thermocouple can, generally made of stainless steel, ceramics and other high temperature resistant, corrosion resistant materials. Junction box: used to connect the thermocouple or display instrument and measurement circuit, have the effect of fixed and protect the terminal, and provide convenience for the connection.