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Sintered ndfeb products have a variety of shapes and sizes, some users in addition to have strict request for the performance of the product brand, also will ask for samples for magnetic relative test. For example, Some users require sampling of the surface magnetic field value of the product, some users require sampling of the magnetic flux value of the product, and some users require sampling of the magnetic moment of the product.

In order to meet these requirements, it has been developed accordingly: 

Tesla meter detects the surface field of the magnet

There are Hall effect Tesla Meter, coil Fattesla Meter and rotating coil Fattesla Meter. 

Hall effect Tesla meter is widely used in the detection of permanent magnet material products. The Hall effect is the phenomenon of a transverse magnetic field, that is, the electromotive force is generated in the direction perpendicular to the magnetic field and the current when a chip semiconductor carrying current is placed in a magnetic field perpendicular to the current direction.

When the hall device and the current through is constant, the Hall voltage is proportional to the measured magnetic field, so the Hall effect can measure the magnetic field.

When hall Effect Tesla meter is used to measure the surface magnetic field of the magnetic pole of a magnet, the following problems should be paid attention to: 1. The plane of hall probe must be perpendicular to the direction of magnetic field, so the plane of Hall probe must be close to the surface of magnetic pole; 2. The surface field at different positions of magnetic poles in an open-circuit magnetic field is not uniform, so the surface magnetic field at fixed positions should be measured.