In recent years, more and more places that need automatic temperature control will choose to buy thermocouple' target='_blank'>thermocouples. So what is the working principle of thermocouples? Below, the thermocouple manufacturers will give you a detailed introduction. A thermocouple is a temperature device. Its main feature is a wide measurement temperature range and relatively stable temperature measurement performance. At the same time, it has the characteristics of simple structure, good dynamic response, remote transmission of electrical signals, and convenient centralized control. The temperature measurement principle of a thermocouple is based on connecting two different conductors or semiconductors in a closed loop. When the temperature of the two junctions is different, a thermoelectric potential will be generated in the circuit. The thermoelectric potential generated in the closed loop consists of two potentials, 'thermoelectric potential' and 'contact potential'. Thermoelectric potential refers to the electric potential generated at both ends of the same conductor due to different temperatures. Different conductors have different electron densities, so they produce different potentials. Contact potential means that when two different conductors come into contact, a certain degree of electron diffusion occurs because of their different electron densities. When they reach a certain balance, the potential formed by the contact potential depends on the materials of the two different conductors. The nature and temperature of their contact points. There are two types of thermocouples, ordinary thermocouples and armored thermocouples. Ordinary thermocouples usually consist of a hot electrode, an insulating tube, a protective sleeve and a junction box. 1. Simple assembly and easy replacement; 2. Compression spring-type temperature sensing element, good shock resistance; 3. High measurement accuracy; 4. Large measurement range (-200℃～1300℃, in special cases -270℃～2800℃ ); 5. Fast thermal response time; 6. High mechanical strength and good pressure resistance; 7. High temperature resistance up to 2800 degrees; 8. Long service life; u200d
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