Detection sorting using colour information

Colour sorting systems have been used to classify and separate a wide range of materials for many years. Non-ferrous metals, printed circuit boards (Zorba or Zebra), heavy metals, copper and plastic flakes can be sorted by colour. Valuable residues are detected and separated using colour information sensors. Visible light spectrum (VIS) detection systems accurately identify subtle colour variations and LED emitters illuminate the detection area. The surface colour information of the material being sorted is determined and classified. This long-lasting equipment has fast response times and numerous advantages in terms of wavelength range, colour spectrum, high light intensities and energy efficiency.

Separate non-ferrous metals, heavy metals, circuit boards and plastic flakes

Colour detection sensors go beyond the sensory perception achieved by the human eye, which can differentiate between green and blue PET flakes or brass and copper. We perceive colour in the visible light spectrum (VIS), ranging from approximately 400 to 780 nm. This spectrum is positioned between the ultraviolet (UV) and infrared (IR) light spectra, which are invisible to the human eye. Highly accurate, colour sorting sensors can identify colour nuances within the RGB range, detecting around 16.8 million colours. Like other sensor-derived data, secondary characteristics can help to distinguish useful differences.

  • Colour information sensor sorting technology for classifying a wide range of materials and valuable residues.
  • Detect and sort non-ferrous metals, printed circuit boards (Zorba or Zebra), heavy metals, copper and plastic flakes by colour.
  • Low-cost solution for separating non-ferrous metals, can be combined with 3D detection equipment to produce high-quality concentrates.
  • Effective, optical-based sorting system in the RGB colour space, detecting around 16.8 million colours.
  • Ability to sort materials including plastic flakes with a grain size of 3mm.
  • UniSort Finealyse

    • High-resolution colour sorting unit for bulk materials with feed, dispensing device, acceleration conveyor belt, discharge hood and material hopper.
    • Highly selective colour detection, ideal for recovering copper, brass, lead, cables and mixed non-ferrous materials to achieve high purity levels.
    • Low over-sorting with grain and fraction sizes from 3mm – 20mm.

    • High-precision colour and shape sorting system for separating non-ferrous heavy metal concentrates and industrial minerals.
    • High throughput, combination sensor sorting with RGB line scan camera and 3D detection with laser triangulation.
    • Single object evaluation with working widths of 1,000mm, 2,000mm and 3,000mm.


MAGSEP is your market-leading specialist for metal and waste recycling solutions. We’ve installed sorting and separating equipment in over 300+ applications worldwide.


Do you want to optimise the accuracy and efficiency of your recycling or waste processes? Turn valuable materials into a high level of purity for resale and maximise your outturns. We can design and deliver solutions for your plant or facility, including process concept development. Our expertise covers magnetic separations, sensors, analysers and system technologies for the primary and secondary raw materials sector. We supply parts and services, and we will help you with the installation and optimisation of your equipment.

The MAGSEP team includes dedicated application specialists and engineers who understand your processing challenges from a local perspective. Our aim is to help you get the most from your recycling equipment with cost-effective and customisable solutions.


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