Bulletin 42 Photoelectric

Bulletin 42 Photoelectric Sensors from Allen-Bradley comprise a broad family of cylindrical and miniature photoelectric sensors spanning over 260 catalog numbers across prefixes including 42KA, 42GRL, 42CF, 42CM, 42EF, 42JT, and 42JS. Catalog numbers follow a structured nomenclature: the barrel material and size code immediately follows the bulletin prefix (CA = 18 mm plastic, CF = 12 mm metal, CM = 18 mm metal, CS = 18 mm stainless steel), followed by the sensing mode (U = retroreflective, P = polarized retro, D = diffuse, B = background suppression, R = receiver, E = emitter, D8 = laser diffuse), a range code, an output type (NPN or PNP, with or without adjustment), and a connection style (-D4 for 4-pin M12 quick-disconnect or -A2 for 2 m PVC cable). Popular in-stock examples include the 42KA Ultra Mini series in transmitted-beam and diffuse variants with side or front through-hole mounting, the 42GRL Series 9000 long-range transmitted-beam emitters, and the 42JS-D2MNA2-F4 diffuse sensor with a 250 mm sensing range and red LED. Consult the Bulletin 42 Photoelectric Sensor Technical Data (42C-TD001) for full specifications and selection guidance.