The LTH-1550 Reflective Photointerrupter is a compact optical sensing device that combines an infrared (IR) emitting diode and a phototransistor in a single package. It detects the presence, absence, or movement of an object by sensing the amount of infrared light reflected back from the object. The LTH-1550 is suitable for object detection, position sensing, counting, rotary encoder applications, and automation systems. Its compact design makes it convenient for use in embedded systems, robotics, printers, and electronic control circuits.

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