Allen-Bradley 42SMU-7251-QD Photoswitch Transparent Object Detector

Allen-Bradley 42SMU-7251-QD Photoswitch Transparent Object Detector is a ClearSight polarized photoelectric sensor from the 7000 Series, designed to detect transparent materials such as film, glass, or clear bottles on production lines. The sensor uses polarized, linear sensing to identify clear objects against complex backgrounds, making it suitable for bottling and packaging applications where standard diffuse sensors struggle. It provides a PNP (source) output and arrives with a 4-pin Mini QD connector on a 3 m (9.8 ft) cable for straightforward wiring in industrial environments. The family includes the 42SMU-7250-QD (NPN output) and 42SMU-7251-QD (PNP output) variants, both employing polarized sensing with visible red illumination to aid setup. Typical applications include transparent-bottle detection on conveyors and presence checks for film or labels in packaging lines. The ClearSight 7000 family emphasizes polarized sensing and visible red illumination, and its compact form factor is engineered for tight installations where space is at a premium.