18-MM SENSORS
S51 18-mm sensors in through-beam, retro-reflective, polarized retro-reflective and diffuse modes have a flat, cylindrical housing that offers mounting choices using traditional 18-mm locking nuts or by direct-mounting with two-through holes. The mounting-hole configuration makes it possible to replace many non-threaded sensors. S51 sensors have a sensitivity adjustment and a variety of output configurations.
