The APS-90 is a high-precision people sensing device. The stereo camera generates a detailed 3D heightmap of areas up to 8 x 8 m. The software is able to differentiate between people and objects and delivers valuable statistics of customer traffic. The device automatically detects its installation height and angle and is therefore easy to install. With the modular frame it can be surface-mounted or flush. Due to the extreme simplicity of form and the elimination of unnecessary details, the APS-90 blends in with various surroundings. The device has a friendly, unobtrusive appearance and avoids the technical character of a surveillance device.