The Loptex Optosonic Sorter is equipped with two different sensing devices: The Optical detection of coloured contamination doubled with ultrasonic detection of colourless material.

The raw material is first passed in front of the Acoustic Sensor and then the Optical Sensor. The Acoustic Sensor emits ultrasound waves. Any contamination with compact surface structure like plastic reflects these waves into the receiver. The receiver then triggers the ejection device.

The Optical Sensor consists of standard fluorescent light tubes and custom-made photo sensors arrays. Any colour contamination reflects less light to the photo sensor arrays, which then trigger the ejection device.

Only the Pneumatic Valves placed in front of the contamination will be activated. The duct opposite the valves, presents an opening through which the contamination is blown into the waste container.