Programmable rotary position sensors use magnetic pick-up

NOVOTECHNIK Vert-X 22E Series of programmable touchless rotary sensors use a magnetic pick-up that is secured to the rotating object, so that there is no direct mechanical linkage between the shaft and the measuring system, and therefore no wear. Devices can be programmed by customers or at the factory for the slope of the linear output, zero and end-points, mid-point and switch steps. As a result, customers can optimize this angle sensor for their specific application.

http://www.novotechnik.com/vx22E