VDW Verein Deutscher Werkzeugmaschinenfabriken e.V.

Radar sensors are unaffected by temperature, pressure or vacuum and provide correct readings under all environmental conditions. Due to their physical measuring principle, ultrasonic sensors are exposed to considerable influences because the sound running time changes with temperature, e.g. due to solar radiation and gas composition. Even in heavy fog, wind or rain, the sound waves are additionally attenuated and the measuring range further restricted.