STV Tech India Private Limited

Most welding helmets include a window (visor) covered with a filter called a lens shade, through which the welder can see to work. The window may be made of tinted glass, tinted plastic, or a variable-density filter made from a pair of polarized lenses. Different lens shades are needed for different welding processes.

When activated, the helmet can detect changes in light and reduce the auto darkening filter (ADF) shade to fit the situation. The helmet's sensors can tell different kinds of light apart, so you don't have to worry about natural light or light bulbs setting it off or not being able to pick up on the welding arc