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explosion hazardous areas, requires temperature classification. For associated apparatus this classification is not
needed.
A
Z
Zone 0
Zone 0 comprises locations in which a dangerous explosive atmosphere is present continuously or frequently.
Likelyhood of the occurrence of an ignitable mixture: constantly, for long periods or frequently
(guide value: >1000 h/a).
Zone1
Zone 1 are locations in which an explosive or dangerous explosive atmosphere is likely to occur.
Likelyhood of the occurrence of an ignitable mixture: occasionally during normal operation
(guide value: 10…1000 h/a).
Zone 2
Zone 2 are locations in which an explosive or dangerous explosive atmosphere is likely to occur only rarely and if,
only for a short time.
Likelyhood of the occurrence of an ignitable mixture: unlikely or rarely and then only for a short time
(guide value: <10 h/a).
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