The ATEX directive (also known as ATEX 100a) is applicable on products used in explosion hazardous zones. This directive also covers non electrical products, like our diaphragm pumps. From July 2003, it is mandatory within the EU to have ATEX certificate on products which are intended for use in EX-zones. There are three main categories (zones) in the ATEX directive:

CAT 1 (zone 0), flammable material present continuously or for long periods
CAT 2 (zone 1), flammable material present occasionally in normal operation
CAT 3 (zone 2), flammable material present in abnormal conditions for short periods