A good way to distinguish the iron boron strong magnet N35-N52 is introduced

Chin-iron-boron strong magnets are generally divided into N35/N38/N40/N42/N45/N48/N50/N52 and other grades, and the most obvious difference between each performance grade is the magnetic properties, for example, the higher the performance grade, the better the magnetic properties of the product with the same specifications. However, Chin Iron Boron strong magnets are a kind of surface molecules and its active products, so the surface of Chin Iron Boron strong magnets are subject to electroplating treatment, such as galvanization, nickel plating, nickel-copper-nickel plating, epoxy resin plating, and so on. Usually, we do not have the instruments to test the magnetism of the product with us at any time, so how do we go about judging the product performance of a chin iron boron magnet? To be exact, there is no way to judge the performance of a magnet product without any testing equipment.
Because the appearance of all look the same, see is not to see what the results, you may find a few magnet suppliers, some offer 0.28, some offer 0.1.
This raises the question, why is that quoted price so cheap, is it really the grade I want?
In the actual work, we often encounter the need to judge the product magnetism, if there is a Gauss meter, we can make a general judgment based on the surface magnetic field of the product.
If we have a Gauss meter, we can make a general judgment based on the surface magnetic field of the product, but if we don't have an instrument, we need to use the product's own unique magnetic conditions to judge. First, use the magnet to correspond to attract or repel, from which we can judge the magnetic poles of the magnet product, at least the magnetic poles that can be judged in a unified direction. Second, with the feel of the hand, panning the two absorbing magnets, with the feel of the magnet can feel the magnetic strength of the magnet products. Third, use a magnet across a wooden board adsorption of a ferrous object, and then let the magnet slowly leave the board, see how far away, the ferrous object fell from the board, which distance, which is magnetic strong
Fourth, the company allows the best to buy a magnetic testing equipment, such as Gauss meter, or magnetic flux meter, etc. to facilitate testing.