Classification of ATEX zones
ATEX zones are classified according to two parameters: - the types of combustibles that may be encountered (dust or gas) - the frequency or duration during which an explosive atmosphere is likely to occur.
Warnings
- Carefully read the Instructions for Use used in this technical advice before consulting the advice itself. You must have already read and understood the information in the Instructions for Use to be able to understand this supplementary information.
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Classification of ATEX zones
| Explosive atmosphere | Gas type combustible substance | Dust type combustible |
|---|---|---|
| Present permanently or for long periods (more than 1000 h per year) |
ZONE 0 | ZONE 20 |
| Present occasionally (more than 10 h and less than 1000 h per year) |
ZONE 1 | ZONE 21 |
| Present accidentally (less than 10 h per year) |
ZONE 2 | ZONE 22 |
