Laser beams are harmful to the human eye. One should never look directly at the laser beam or through optical instruments. Mounting brackets and reflective models are also supplied with a reflector. The SM312 series photoelectric sensors from Turck Banner are standalone, DC-powered sensors. This Mini-Beam SM312 series consists of compact high-performance sensors with an 18-mm threaded lens. The SM312 series is ideal for detecting registration marks, baggage handling, and conveyor applications for bottles. Expert models with learning mode configuration via push buttons are available. Plastic housing; M18 "front nose mounting" or screw fastening. Button or remote programming. Automatic, precise sensitivity settings at low contrast. Bipolar output, light-on/dark-on functions. Multifunctional LEDs for easy adjustment and monitoring. Full electrical protection. Available in the following modes: opposing, transparent plastic opposing, polarized, non-polarized reflecting, convergent, and diffuse.