In highly automated industrial processes the colour is often a selection criterion for detecting, sorting or inspecting various products and goods. Both the colour of a product itself and the packaging, labels or imprints can be precisely detected using electronic colour sensors.
With contrast sensors, print marks and very flat objects can be detected easily and reliably.
Sensors for the detection of transparent objects consist of a retro-reflective sensor with polarisation filter and a very fine prismatic reflector. They safely detect glass, film, PET bottles or transparent packaging and can be used for counting bottles or glasses or monitoring film for tear.
Photoelectric level sensors detect levels of bulk materials and non-transparent liquids without contact.