Sensor Heads-Blocks, Photoelectric Thru-Beam Source: Type - Modular Sensor Head w/Body; Sensor Type - Photoelectric Thru-Beam Source; Sensing Position - Right Angle; Enclosure Rating - NEMA 3,4X,6P,13; Voltage - 120V AC; Sensing Range - 300-ft (90m); Receiver Model - E51; Manufacturer Series - E51 Modular