Zinc pot with thermocouple is better _ instrument

Zinc pot is special thermocouple, divide into two kinds, ceramic tube and stainless steel corrosion and corrosion function, long life, high reliability. Mainly used for galvanizing pan, aluminum plating zinc smelting silicon pot, pot, etc of temperature measurement. Hot dip galvanized temperature is an important process parameters, hot dip galvanized zinc temperature control is a dynamic process, directly affect the plating parts, zinc consumption, energy consumption and the service life of zinc pot. Commonly used zinc liquid temperature measuring thermocouple protection tube for low carbon steel or stainless steel tube, severe corrosion in the liquid zinc, hot dipped enterprise in order to prevent the thermocouple protection tube corrosion, had to be mounted on the outside of the thermocouple protection tube to protect casing. Traditional nonmetallic thermocouple protection tube are quartz, corundum and silicon dioxide combined with silicon carbide, silicon nitride combined with silicon carbide and silicon carbide, quartz, corundum temperature tube short time temperature measurement is commonly used in laboratory, silicon carbide thermocouple tube ( SiO2- 碳化硅、氮化硅- 原文如此) When use airtight porcelain tube also need to add or corundum tube, there are actual temperature in production use ills of error, can't meet the needs of continuous hot galvanizing industry operation, collide with each other working environment. The current majority of galvanized zinc manufacturers to monitor temperature, mounted to the casing outside the thermocouple protection tube immersed in liquid zinc, due to improper casing diameter selection, form the air resistance, can not accurately reflect zinc liquid temperature, and zinc - Iron reflects intense, life is more commonly 1 - In February, the 3 - less 5 days. 1, the basic principle of thermocouple temperature measurement is to two different material a conductor or semi-conductor welding, form a closed loop. Due to two different metal carries different number of electrons, when two conductor when there is a temperature difference between the two fixation point of high potential to low potential discharge phenomenon occurs, thus formed in the loop current, the bigger the temperature difference, the greater the current, this kind of phenomenon called the thermoelectric effect, also called the seebeck effect. Thermocouple is in using this effect to work. 2, thermocouple type and structure formation ( 1) Thermocouple types commonly used thermocouple could be divided into two types: standard thermocouple and non-standard thermocouple. Standard thermocouple refers to the standard specifies the thermoelectric potential and the relationship between temperature, permissible error, and a unified standard score table of thermocouple, it has the matched digital display table to choose from. Non-standard thermocouple or on the order of magnitude less than the range using standardized thermocouple, generally no unified indexing table, mainly used for the measurement of some special occasions. Standardized thermocouple since January 1, 1988 in our country, the thermocouple and thermocouple were manufactured according to IEC international standard, and specify the S, B, E, K, R, J, T seven standardization thermocouple type thermocouple for our country unified design.