Unlike cameras that passively record image information, radar systems are an active technology. These sensors emit electromagnetic waves and receive the “echo” that is reflected back from the surrounding objects. Radar sensors can therefore determine, especially, the distance and the relative speed of these objects with a high level of accuracy. That makes them ideal for maintaining distances, issuing collision warnings or for emergency brake assist systems. Another decisive benefit of radar sensors, compared to optical systems, is that they function regardless of weather, light or visibility conditions because they use radio waves. That makes them an important component in the sensor set. Like its camera systems, ZF also offers a broad assortment of sensors with different ranges and opening angles (beam width) The imaging Gen21 Full Range Radar, for example, is a good option for highly automated and autonomous driving due to its high resolution.