Digital IR Proximity Sensor, 0-200cm - 

SEN0381 is a digital IR proximity sensor with button and indicator. It provides adjustable detection distance within 0 to 200cm and comes with real-time status feedback. Press down the button, then the indicator starts to flash, this time the detection distance can be adjusted. The sensor will auto detect and save the distance between it and obstacles ahead. In addition, this sensor is equipped with 3PIN data cable (digital signal output) that can be directly plugged into an Arduino IO expansion board. The product can be widely used in applications like smart home, house security, intelligent detection and control, robot obstacle, and so on. The sensor is based on the principle of diffuse reflection of IR light on objects.