The particle analyzer CAMSIZER P4 uses the principle of dynamic image analysis (ISO 13322-2). The sample is transported to the measurement field via a vibratory feeder where the particles drop between a planar light source and two CCD cameras. The projected particle shadows are recorded at a rate of more than 60 images per second and analyzed. In this way almost every single particle in the bulk material flow is recorded and evaluated. Thus, it is possible to measure a wide range of particles from 20 µm to 30 mm extremely accurately, without having to switch measuring ranges or make adjustments.