The composition of the magnet is iron, cobalt, nickel and other atoms. The internal structure of the atoms is relatively special, and they have magnetic moment. Magnet can produce magnetic field and has the characteristics of attracting ferromagnetic materials such as iron, nickel, cobalt and other metals. Next, I'll show you how to distinguish the magnetic force of a magnet.
The first method is to place two magnets of the same size on a plane that can be adsorbed, such as a patch, a blade, an iron door, etc., and identify the size of the magnetic force by hand. Always feel the right way. No matter what you want to do with it, hand feeling is a very important feeling.
The second way is to use the electronic scale: a magnet with weak magnetic force is generally related to its density. If the density is small, the magnetic force is relatively small. If the weight is heavy, the magnetic force is relatively large. On the contrary, if the weight is light, the magnetic force is small. That is to say, heavier magnets are relatively large. When measuring magnets, they should be accurate to grams.
The third kind of Gauss meter, the test results are more intuitive and clear, but when testing, it should be noted that the center of the magnet is measured by the center of the magnet. If a magnet edge is measured, the center of the magnet is not accurate.