Casting lines in the steel industry operate under extreme thermal and mechanical stress, where precision and reliability are critical to maintaining production efficiency. The detector is installed within the cooling system of continuous casting machines, where it continuously monitors the position and alignment of the roller assembly that guides the molten steel as it solidifies. This ensures the steel maintains its desired shape and thickness, preventing defects that could lead to costly rework or downtime. By providing real-time feedback on the roller’s movement, the detector enables operators to make timely adjustments, maintaining the integrity of the casting process. Its integration into the machine’s control loop allows for automated corrections, reducing the need for manual intervention and enhancing overall process stability. In secondary applications, it may also be found in rolling mills, where it supports the precise alignment of rolls during the shaping of steel profiles.