Working principle: After the electromagnetic iron detacher is powered on, the electromagnetic generation generates a strong suction force to remove magnet impurities in the material; while the special permanent magnet "NdFeB" with high residual magnets inside the permanent magnet detacher does not need to be powered on, and a powerful magnet will naturally be generated to remove ferromagnetic impurities in the material.   Adaptable environment: The electromagnetic iron deductor has weak adaptability, the working environment altitude cannot exceed 4000 meters, the ambient temperature cannot be higher than 40 degrees or lower than -20 degrees, the air humidity cannot be greater than 90%, and it cannot work in a corrosive environment; while the permanent magnet iron deductor has strong adaptability and can work normally in environments with severe dust, humidity, and salt spray corrosion at the beach. There is no temperature rise problem, the magnetic field is constant, and the sealing is good. However, over time, the magnetic field of the permanent magnet iron deductor will gradually decay.   Scope of application: The electromagnetic iron deferrer has strong magnetic force and can absorb 0.1-35 kilograms of materials at one time, but cannot work continuously for a long time; while the permanent magnet iron deferrer is suitable for environments with relatively few ferromagnetic prices. When there are many ferromagnetic impurities adsorbed, impurities must be manually removed, and is suitable for environments with less iron-containing continuous working.   Magnetic field strength: Iron deleters with a temperature greater than 15,000 Gauss must be achieved by electromagnetic. Electromagnetic iron deleters can reach 30,000 Gauss. Iron deleters less than 15,000 Gauss are mostly realized by permanent magnets. Because permanent magnets are more energy-saving. There is a clear application dividing line between permanent magnet iron deleters and electromagnetic iron deleters through the strength of the magnetic field.