FOTEK Photoelectric Sensor A3R-4MX in Pakistan BR7017 Description A photosensor is an electronic component that detects the presence of visible light, infrared transmission (IR), and/or ultraviolet (UV) energy . ... Photosensors are used in a great variety of electronic devices, circuits, and systems, including fiber optic systems. Specifications: Brand Fotek Model Name/Number A3R-4MX Response Time 15ms Current Consumption 2VA max Housing Material Case Intensive ABS; Lens PC Operating Voltage 24~240 VAC