Since more than 10 years iMAR manufactures the iMWS wheel speed sensor and this month we manufactured the 500th of it. For skilled integrators, following the instruction manual step by step, the integration of this sensor on the rim of the wheel is much faster than to integrate a full incremental encoder. It is used where a resolution of few centimeters is sufficient and where a fast integration is mandatory. As it is mounted on the wheel itself, the magnetic strip and the adjustment of the sensor head has to be executed again when the wheel is exchanged. Also a periodic imechanical nspection is recommended.