Swing trade spy options
Passive variable reluctance or magnetized strips on a rotating code rotor, wheel, or band are sensed by either a Hall-effect or magnetoresistive sensor.
Motor speed and position accuracy dictate which of the two is better suited for an application. Available variations are incremental and absolute types; non-contact and bearing versions; and units in which rotating unit and encoder body are effectively separate subcomponents.
It is usually made from an injection-molded ferrite embedded with the pole array.