The following certificates are available for download:    DIN EN ISO 9001:2008 (Quality management system) (146kB)    Directive 97/23/EG (Quality assurance system) (195kB)    Directive 94/9/EG - Annex VII (Explosion protection) (151kB)   VdS Certificate of approval acc. guidelines VdS 2344 (2005-12)  Turbo-Lux  2 (381kB) DIN EN ISO 9001:2008 (Quality management system) (146kB)