The BALLUFF BES 516-326-G-E5-C-S4 photoelectric sensor features an M18x1 threaded housing with dimensions of Ø18×44.5 mm, designed for flush mounting. It offers a sensing range of 8 mm with PNP normally open (NO) switching output, operating at 200 Hz frequency. Constructed with nickel-plated brass housing and PBT sensing surface material.