Fire extinguisher does not need to be Ex certified because it is intended to be used after an explosion to extuinguish fire.
What happens if this initializes another explosion while using it? May this ever happen?
Keep up good work!
Arpad
A photo we took last year, not any from early 80’s. Ex
30 June 2003. Before that ATEX was not mandatory (differentiation might be
Back in early 1999/2000 many flurescent tube Ex type light fitting manufacturers
Absolutely inerted mixture is one which does not form a flammable atmosphere
arpadveress 
