Points for attention in welding of armored thermocouples

The manufacturing of the thermal resistance of the sheath, first pass the thermal resistance lead (usually pure nickel wire) through the magnesium oxide insulating material), and then pass through the stainless steel protection tube, and carry out multiple deep drawing annealing to form the sheath thermal resistance lead (equivalent to the sheath. thermocouple material). Then, lay down the material of the thermal resistance and temperature sensing element to the necessary length, strip off the lead ends, and weld with the sheath thermal resistance lead. The quality of the welding process determines the measurement effect of the thermal resistance of the sheath. The armored thermocouple welding project needs to pay attention to the following points: 1. The lead wires of the thermal resistance pass through the magnesium oxide insulating sheath respectively. Then, it passes through a stainless steel tube and is then filled with magnesium oxide powder. Or use an existing prefabricated sheath. 2. The head needs to be purchased. The inner diameter of the head is a little larger than the outer diameter of the stainless steel tube. It is enough to cover it. Please note that the sealing length should not be less than the shielding length of the thermocouple. What should be paid attention to in the welding of the sheathed resistance temperature measuring body? According to network reports, in recent years, more and more manufacturers have adopted the sheath thermal resistance as the core of the assembled thermoelectric resistance, and transformed the traditional assembled thermoelectric resistance. With the development of technology and the advancement of people's use concept, the assembly thermal resistance is completely replaced by the development trend of products with constantly updated sheath thermal resistance. The sheathed thermocouple is a new type of thermoelectric resistance developed with reference to the manufacturing technology of the sheathed thermocouple. It has the advantages of fast thermal response time, bending, high voltage resistance, shock resistance and robustness to the assembled thermoelectric resistance. The sensor for measuring temperature usually has a recorder, a display and a display instrument, a recording instrument and a regulator, and can also be used as a temperature sensing element for an assembled thermal resistance.

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