Automatic Darkening Welding Filter : An optical filter that automatically switches from a light state to a dark state (shade) in response to change in incident light intensity
Grainger, Inc. (Maintenance, Repair and Operating MRO), Glossary of Safety Terms, IL, USA 2012. www.grainger.com/images/GlossaryofSafetyTermsPDF.p df, (IndS/Maint, Repr and Opr - Amer) {79}