The R2 and R3 series in cuboid subminiature housings and the extremely flat versions of the R2F and R3F series each are available as through-beam sensors, retroreflective sensors and triangulation sensors with background suppression. These sensors are designed for installation in confined spaces and comprise four designs and three functional principles. The R2x and R3x series laser sensors always create a sharply defined, circular and clearly visible light spot on the object. They are suited to the precise detection of intricate objects. They include DuraBeam laser technology, which combines LED and laser sensor features.