Color These sensor are used for true color recognition and are commonly used for registration mark detection on difficult printing or packaging targets that have poor gray-scale contrast.

Other frequent uses are process and quality control applications when reliable color differentiation is needed.

The group includes rectangular, fiber-optic and vision based products.  For gray scale, non-color applications, see the Contrast section.

This section includes rectangular and fiber-optic units using LED (red/green) or Laser (red) light sources.  They react to gray-scale values only; for more critical applications where true color (RGB) detection is needed, see the Color sensor section.