■ Industry standard 18 mm diameter threaded body has flat sides allowing it to be mounted like a tubular sensor or against any flat surface  ■ Right-angle viewing models mount in a depth of only 6/10th of an inch ■ Perfect Prox® technology provides exceptional background rejection and application problem-solving ■ Visible sensing beams let you see where the beam is aimed for quick setup and alignment  ■ Solid polyurethane housing completely encapsulates internal circuits for high resistance to shock and vibration ■ Adaptable modulation circuit provides immunity to crosstalk from other closely mounted sensors  ■ The industry’s only background rejection sensors with a 2-wire circuit design  ■ Models available with both AC and DC operation in a single unit — up to 264 volts AC!  ■ 4-wire DC sensors offer both NPN and PNP outputs  ■ Output status indicator visible from a wide 270° angle