What kind of material is the hall induction ring usually made of?

The special hall induction multipole magnetic ring on the constant speed motor and some water pumps is mostly the same type ferrite magnetic ring. This kind of ferrite magnetic ring is stable in magnetism and has distinct magnetic poles. It provides a stable magnetic pole signal for hall induction, and thus is widely used in speed measurement.

Speed measuring magnetic ring (8 pole magnetization)

Magnet manufacturers

Φ 22.5 x Φ 12 x 8 ac speed regulation gear motor magnet motor magnetic multipole magnetic ring of speed of 24

Magnet manufacturers

Hall induction magnetic ring of motor is composed of permanent magnet sintered by iron powder, ferric oxide and rare earth elements.
Hall induction ferrite ring is divided into axial multipole magnetic ring and radial multipole magnetic ring. The magnetization mode is mainly processed and produced according to the requirements of customers. Homogeneously permanent magnet ferrite magnet has a special advantage in magnetization.