The BALLUFF BES 516-300-S281-S4-D photoelectric sensor features a compact design with dimensions of Ø12×69 mm and M12×1 threaded housing for flush mounting. It offers a sensing range of 1.5 mm with NPN normally open (NO) switching output, operating at 1000 Hz frequency. Constructed with 1.4104 stainless steel housing and E-grade sensing surface material.