www.austriamicrosystems.com/AS5215

Revision 1.11

13 - 26

AS5215

Datasheet - Detailed Descr i pti on

Figure 9. Magnetic Field Lines in Plastic or Copper Shaft

If the magnet is mounted in non-magnetic material, such as plastic or diamagnetic material, such as copper, the magnetic field distribution is not

disturbed. Even paramagnetic material, such as aluminium may be used. The magnet may be mounted directly in the shaft (see Figure 9).

Note:

Stainless steel may also be used, but some grades are magnetic. Therefore, steel with magnetic grades should be avoided.

Figure 10. Magnetic Field Lines in Iron Shaft

If the magnet is mounted in a ferromagnetic material, such as iron, most of the field lines are attracted by the iron and flow inside the metal shaft

(see Figure 10). The magnet is weakened substantially.

This configuration should be avoided!