Abstract: In a multi-polar electromagnetically energized rotary indicator each of the pole pieces is associated with a significantly isolated flux path, which, at one end of the turning axis of the rotor part of the indicator, leads diametrically to a flux concentrator displaced 180.degree. from the pole piece in question. In a particular embodiment, this result is realized by a system of separate but mutually nested bridging parts of ferromagnetic material, each of which defines an essentially independent flux path. Other embodiments provide quasi-independent flux paths serving a similar electromagnetic function. An arrangement for sensing the response of an indicator is described.