divide mixed material flows into uniform fractions. The material (e.g. PET bottles, electrical waste, scrap metal and household waste) reaches the detection area optimally scattered by way of a fast-moving conveyor belt. Once there, sensors “scan” the material flow based on colour, shape and type of material. A metal sensor detects metals, with optional detection of stainless steels as well. The electronic analysis assembly then activates the air ejection unit with exact timing and positioning, which removes the contaminants from the material flow.