Using a Gaussmeter to measure the surface magnetism cannot actually accurately determine the grade of the magnet material.

1. It is inaccurate to just look at the surface magnetism, and the results measured by each person are different. Because the placement and distance may be different, the values are different. This can only be used as a rough reference. In addition, the results measured by Gaussmeters of different brands will also be different.

2. For magnets of the same performance, different specifications, sizes, thicknesses, etc. will cause different Gauss values. Under the same magnet specifications, the thicker the thickness, the greater the surface magnetism (Gauss value).

Experienced technicians can make a rough judgment based on experience. If you want to determine the specific grade of the magnet, you need to measure and analyze the demagnetization curve.

Therefore, it is generally difficult to judge the material grade of the magnet from the value measured by the Gaussmeter. Usually, it is based on the magnetic flux.

Gaussmeters can roughly determine the strength of the magnet by measuring the surface magnetism. Magnets of the same specifications and different performance levels have different surface magnetism. In addition, it can also detect which side the N and S poles of the magnet are on, whether it is multi-pole magnetization (multiple NS on one face), etc.