The system consists of the X-Pact® Sense hotCam and the X-Pact® ProBAS automation system. The resulting proved technology measures the width of the strip and detects the position of the strip edges between the mill stands in the hot finishing mill. The system uses a closed-loop algorithm to calculate the strip center line deviation and provides a levelling correction signal for the mill stands. For the different rolling sequences (head, filet, tail end) different control methods are used. Smooth transition between the control actions in the different phases is ensured. The X-Pact® Sense hotCAM itself is designed against harsh environmental conditions like high strip temperature, fog, steam, dust and vibrations.