The XUB4BPAWL2 is a diffuse-mode photoelectric sensor in a cylindrical M18 housing — the standard barrel form factor that drops into existing M18 threaded mounts or bracket kits on conveyors, packaging machines, and material-handling lines. Diffuse detection means the emitter and receiver share the same housing; the sensor triggers on light reflected directly off the target object. No separate reflector or receiver head to mount, which simplifies installation on short-range presence-detection tasks.
The M18 cylindrical design is the de facto standard for photoelectric sensors in washdown and dusty environments — the barrel seals against the mounting hole, and the threaded body accepts lock nuts or weld-on brackets common in food-and-bev and automotive lines.