The tin bath casing is equipped with a high-performance video system whose cameras are installed in the bath, either through the side seals, or through the roof.

The main points controlled by this video system are :

• the glass spreading in the bath head end,
• the top rollers (knurls),
• the pushers,
• the fences.

The cameras are sending their images to the monitors installed in the control room.

http://www.bge.be/bge.aux/prdct_5.htm

The cameras are either of the suspended type or installed on floor rolling carriages. In case of the suspended type, the same steel works can support the suspended top rollers and the suspended cameras. The camera itself is lodged in an endoscope tube, water cooled, and the optical components are protected by a gaseous film