{"title":"IR Break Beam Sensor (50cm)","handle":"ir-break-beam-sensor-50cm","url":"/products/ir-break-beam-sensor-50cm","description":"An infrared break-beam sensor pair for simple, reliable motion detection. The emitter sends a beam of invisible IR light to the receiver — when an object passes between them and breaks the beam, the receiver outputs a signal. Works up to 50 cm at 5 V with a fast response time under 2 ms.\n\nThe compact 20 × 10 × 9 mm modules fit easily into tight spaces. The NPN normally-open output can directly drive a relay (up to 100 mA) or connect to any Arduino or microcontroller GPIO pin.\n\nKey Features\n\n\n50 cm Detection Range – At 5 V (20 cm at 3.3 V)\n\nFast Response – Under 2 ms response time\n\nNPN Normally Open Output – Up to 100 mA, can directly drive a relay\n\nCompact Size – 20 × 10 × 9 mm per module\n\nWide Temperature Range – −25 °C to 60 °C\n\n\nSpecifications\n\n\nDetection Distance – 50 cm at 5 V, 20 cm at 3.3 V\n\nDetection Method – Through-beam (non-transparent objects)\n\nWorking Voltage – DC 3.0–5 V\n\nWorking Current – 25 mA\n\nOutput Mode – NPN normally open\n\nOutput Current – 100 mA max\n\nReceiving Angle – Under 10°\n\nResponse Time – 2 ms\n\nOperating Temperature – −25 °C to 60 °C\n\nModule Dimensions – 20 × 10 × 9 mm\n\nCable Length – 25 cm\n\nEnvironment – Indoor use (not waterproof)\n\n\nWiring\n\n\nTransmitter – Red wire → 5 V DC, Black wire → GND\n\nReceiver – Red wire → 5 V DC, Black wire → GND, White wire → Output (NPN)\n\n\nIdeal For\n\nMotion and object detection\nSpeed measurement and lap timing\nCounting and inventory systems\nRobotics competitions\n\n\nPackage Contents\n\n1× IR break beam receiver\n1× IR break beam transmitter\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2572,"title":"Default Title","sku":"DF-SEN0503","price":8.2,"on_sale":false,"in_stock":true,"available_quantity":736,"option1":"Default Title"}]}