AL2109-P-1820-3403/40b/49/143. High resolution light grid for detecting people and objects. Low-profile, high resolution light grid for monitoring locking edges on elevators and accesses. Thru-beam light grid with integrated controller. In accord with EN81-70 and EN12015/16. Dense monitoring field with up to 135 beams ensures that small objects are detected. Object detection up to distance of zero. Automatic beam crossing. Insensitive to reflection and ambient light. Packaging unit: 12 pieces, without accessories. Snap locking. Plug fits through drill holes diameter min. 8 mm