What's the difference between a thermocouple and pressure spring fixed thermocouple _ instrument

The thermocouple thermoelectric emfs growth over the course of measuring the temperature, the size of the thermoelectric emfs and thermocouple temperature difference on both ends of the conductor material and, only has nothing to do with hot electrode length and diameter. By welding on both ends of the two different ingredients of conductor, form a loop, directly measuring WenDuan call work side, the terminal end is called the cold end, also known as the reference. When work end and reference end there is temperature difference, will produce thermal current in the circuit, connected to display instrument, the instrument will indicate the thermocouple thermoelectric emf generated by the corresponding temperature value. The structure principle of thermocouple is made up of a conductor, high insulation magnesium oxide, coat 1 cr18ni9ti stainless steel protecting tube, after many integrated control. Thermocouple products are mainly composed of terminal block, terminal and thermocouple basic structure, and with various mounting device. Thermocouple insulation type and hull type two kinds. Thermocouple can bend, high pressure resistance, heat fast response time and strong and durable many advantages, such as it and industrial use, as measure temperature sensor, and usually display meter, recording meter and electronic regulator, at the same time, also can be used as a temperature sensing element. It can directly measure all kinds of production process from 0 ℃ ~ 800 ℃ in the scope of liquid, steam and gas medium, as well as the surface temperature of the solid. And compared to the thermocouple is flexible, high pressure resistance, thermal response time is short and strong and durable, etc. Compression spring stationary thermocouple through compression spring will end of thermocouple and surface close to the measured object, in order to improve the reliability and accuracy of measurement. Fixed thermocouples, pressure spring to tighten connection bolt on the object to be tested first, then analyte thermocouple is clingy, tighten the set screw, then twist lock tight card sets. Compression spring stationary E type thermocouple through compression spring will end of thermocouple and surface close to the measured object, in order to improve the reliability and accuracy of measurement. It with display instrument and so on, can be directly measured temperature within the scope of 0 ~ 400 ℃. Thermocouple with soft extension cable, free bending, the advantages of small thermal response time, use convenient wait for a characteristic, suitable for plastics extrusion machine, light textile, food and other industries. Thermocouple temperature measurement principle is based on thermoelectric effect. Connect the two different conductor or semiconductor into closed loops, when the two contacts in temperature is not at the same time, the circuit will produce thermoelectric potential, this kind of phenomenon called the thermoelectric effect, also known as the seebeck effect. Thermocouple as the temperature measurement sensor, usually with temperature transmitter, controller and display instrument, such as process control system, to directly measure or control in the production of a variety of 0 Fluid over a range of 1800 ℃, steam and gas medium and solid surface temperature. Thermocouple can bend, high pressure resistance, heat fast response time and strong and durable many advantages, such as it and industrial prefabricated thermocouple, as measure temperature sensor, through the compensating conductor and display meter, recording meter and electronic regulator.