Arrangement for determining the position and / or speed of a movable portion

Arrangement for determining the position and / or speed, in particular the angular position and / or speed of a movable portion, the arrangement - A permanent magnets having permanent magnet arrangement - One, in particular on its permanent magnet facing side, tipped with sensors PCB, - River guide members and a return part having, wherein permanent magnets are arranged one behind the other in the movement direction, wherein between the respective sensor and the permanent magnet arrangement of a respective flux guiding part is arranged, being on the side away from the river guide parts side of the board, the return part is arranged.