Our reflection light barrier is particularly easy to align thanks to generous installation tolerances. You only install one electrical device plus a reflector. Large reflectors ensure long ranges. The light barriers detect objects regardless of surface, color and material. Thanks to a polarizing filter, they are also suitable for detecting shiny objects. Series=21M, Dimensions=15 x 50 x 42.5 mm, Interface=PNP normally open (NO) PNP normally closed (NC), Functional principle=Optoelectronic sensor, Optical functional principle=Reflection light barrier, Optical feature=Coaxial optics, Beam characteristics=divergent, Light type=LED red light, Range=0...4 m, Connection=Connector, M12x1 plug, 4-pin, Housing material=Zinc, die-cast aluminum, Active surface, Material=Glass, Operating voltage Ub=10...30 VDC, Approval/Conformity=CEcULusEACWEEE