Print mark luminescence scanner, detection range: 254 mm, UV light, light/dark on, Teach-In, timer function, NPN output, PNP output, cable with M12 plug, Detect fluorescent chalk marks, clear glue, tamper-proof seals and other marks that regular contrast sensors cannot, Detect marks on irregular backgrounds, Sense invisible or nearly invisible marks, Compact, space-saving construction, Integral timer available