Automatic electronic mask with an active air purification respirator ideal for TIG, MIG-MAG, MMA welding and grinding operations. With external shading adjustment (DIN 4/4 ÷ 8/9 ÷ 13). The LCD liquid crystal filter darkens automatically when the welding arc is active and quickly returns to its transparent state when the arc is turned off. This means that the operator does not need to lower and raise the mask during operations, allowing them to work with both hands free. It not only has a filter sensitivity regulator depending on the welding process being performed, but also an external regulator that can delay the time between shading and lighting phases when the welding arc is completed, depending on the brightness level of the weld.