A robot for checking the condition of reinforced concrete - particularly underneath roadbridges. C2D2 stands for Climbing Corrosion Detecting Device.

The robot’s movement is based on Vortex technology, where a type of propeller is attached to the underside of the robot. The propeller rotates fast enough for a movable suction cup to stick the robot on to walls and ceilings, where it can then use its wheels to move along these surfaces. The robot is steered via remote control or a computer.