In a classic setup for magnetic position detection the magnetic field strength produced by a permanent magnet, attached to the moving part, is sensed by a fixed sensor. Temperature changes or external stray magnetic fields can introduce inaccuracies to such a system. To overcome these sources of error scientists at the Fraunhofer-Institute for Integrated Circuits IIS in Erlangen Germany have developed 3D magnetic field sensors able to reliably measure the strength and direction of a magnetic field. These sensing elements are so small; several can be integrated onto a single IC. Skillfully used these innovative HallinOne®-sensors will be largely unaffected by temperature changes or the influence of stray fields and can also supply additional information about the magnetic field which can help reduce the influence of other sources of interference. These new sensors open up a whole new dimension in the field of magnetic field measurement.