The QRE1113GR with Optical Switches, Reflective, Phototransistor Output Reflective Sensor is a reflective optical sensor manufactured by ON Semiconductor. It uses a phototransistor output to detect a reflective surface. This device is designed for use in low-cost, stable and reliable presence detection applications such as line-following robots and electronic position-sensing systems. Its mechanical and environmental properties make it suitable for a wide variety of applications that require oneworld and reliable presence detection. The QRE1113GR includes a high-efficiency miniature white LED source and an internally matched NPN phototransistor output. It is designed to provide long operating life with low power consumption and reliable operation over a wide temperature range.