Quite often it happens one Ex installation arrives to industry E.g pharma, the very same day it goes to modified.
In that case immediate checking of Ex compliance required.
Few questions may arise: who is the manufacturer from now on?, etc…
Keep up good work.
Arpad
exprofessional.com
As you’re no doubt aware, bottles of hand sanitizer (Purell, Wet Ones,
The Beirut— capital of Lebanon — explosion, which killed more than two hundred people,
Are they complementary or do they substitute each other? Or just another
Fact: it does have accus. Not ok to use them in any
arpadveress 
