This is a magnet used in a rotary encoder magnetic induction system in gas meters or gas meters. It is ring-shaped or hollow cylindrical and works with Hall elements to achieve accurate measurement of flow or gas volume. The specific dimensions of the magnet are: outer diameter 9.7 mm, inner diameter 4.7 mm, height 12.4 mm, and radial 4-pole magnetization.
Magnets used together;
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