Schmersal has developed the SLC/SLG440 safety light curtain/grids in Ex version precisely for these applications. These devices can be installed in potentially explosive gaseous and dusty atmospheres of zones 1/21 and 2/22, category 2GD and are used to protect hazardous areas and machine access. When one or more of the beams is interrupted, hazardous movements are brought to a halt.
The series is ATEX certified and further certification – IECEx, INMETRO and CCC Ex – are due to follow. The sensor system is accommodated in a protective enclosure made from non-breakable glass.
Ex-SLC440 safety light curtains for finger, hand and body detection are available in versions with a resolution of 14 and 30 mm as well as ranges of between 0.3 and 20 m. Ex-SLG440 safety light curtains are suitable for access control to hazardous areas. The waterproof and dustproof devices achieve IP66 and IP67 protection class and also have the capability to be used outside.