Sensor Heads-Blocks, Photoelectric Fiber Optic: Type - Modular Sensor; Sensor Type - Photoelectric Fiber-Optic; Mounting Style - Standard Fiber Mounting; Range, Thru-Beam Mode - 0.063" Fiber, 8" (200mm), 0.125" Fiber, 25" (650mm); Range, Diffuse Reflective Mode - 0.063" Fiber, 0.60" (15mm), 0.125" Fiber, 3" (75mm); Response Time ON - AC 20ms, DC 20ms; Response Time OFF - AC 30ms, DC 22ms; Output Mode - Light/Dark Operate; Manufacturer Series - E51 Modular