What's the difference between a thermocouple and blowing 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, 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. 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. By blowing into the nitrogen or other gases, send the harmful gas protection tube, thus improve the life of thermocouple. Is indispensable to 300000 tons of ammonia plant in temperature measuring device. Blow the structure principle of thermocouple is between the thermocouple protection tube outside the original heat and form a gas path, in the gas path, access to a certain pressure of inert gas, to eliminate or reduce the thermocouple under the condition of high temperature and high pressure of reducing gas infiltration of trace elements of tantalum, increase the suction characteristic of the blowing thermocouple, so as to prolong the service life of the thermocouple. The key temperature sensor used in synthetic ammonia plant. Blowing hot press types with blowing blowing air flow type, positive pressure type, without blowing type 3 kinds. Apply to under 1200 ℃ or less without blowing type, suggested that vertical installation. By blowing into the nitrogen or other gases, send the harmful gas protection tube, thus improve the thermocouple life, the service life of about 12 ~ 24 months. 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.