Balluff BOS21M-PA-PT10-S4 Photoelectric Sensor

The Balluff BOS21M-PA-PT10-S4 is a cubic retroreflective photoelectric sensor designed for detecting transparent materials, such as glass, with a sensing range of 0 to 2 meters. This 15 x 50 x 42.5 mm device uses a red LED light source and provides PNP normally open (NO) or normally closed (NC) outputs through a 4-pin M12 connector, powered from 10 to 30 V DC. The sensing surface is glass, and the housing is zinc die casting with powder coating. Mounting options include traditional M4 screw mounting, a separate mounting bracket, or specialized clamps compatible with the housing’s dovetail profile. This model is part of Balluff’s 21M family and is specifically described as a retroreflective sensor for glass detection, suitable for integration on automation lines and packaging equipment where sensing transparent targets is required.