ATEX product groups
ATEX is an abbreviation for ATmosphères EXplosibles (French) and refers to potentially explosive areas. The prerequisite for explosions is the interaction of an oxygen source, a flammable substance and an ignition source. ATEX equipment must not be an effective ignition source, which means in concrete terms: These devices must not cause an explosion.
ExZü product groups
ExZü is a registered brand of the JAUDT company. This is also an abbreviation and stands for explosion pressure surge resistant and spark ignition resistant. In addition to the fact that they may not represent an ignition source, as is the case with ATEX devices, ExZü devices are tested protective systems which prevent the spread of an explosion if one should occur. ExZü devices stop an explosion that has already occurred.