The Auto Darkening Welding Helmet automatically protects the wearer against sparks and splashes, as well as UV and infrared radiation. The anti-glare filter darkens once the electric arc is ignited; beforehand it is transparent. Thus the working environment remains visible at all times and the electrode can be precisely positioned before the welding begins. The filter cassette is 30 per cent larger than that of previous models, giving the user a broader field of vision and more freedom of movement.