This is an edge detection sensor from DFRobot. It will help yourrobotdetect the edge of a precipice, preventing it from falling off a table or down the stairs to it's certain demise! ThisIR distance sensoris connected to an arduino digital pin.
Edge detection sensor
Intelligent Mobile Robotics Platforms
Home Cleaning Robots
Supply Voltage: 2.7~6.2v
Current: < 10mA
Detecting Distance: 2~10cm (Low), <2cm or >10cm (High)