Every piece of ATEX equipment carries a rating plate that sums up its conditions of use. Here is how to read it, using an example.

Example: CE 0080 · Ex II 2 GD · Ex db IIC T6 Gb · Ex tb IIIC T85 °C Db · LCIE 03 ATEX 6146

Element	Meaning
CE 0080	CE marking and number of the notified body that monitors production (here INERIS). The certificate may be issued by a different body (here LCIE)
Ex hexagon	Specific ATEX marking
II	Equipment group: I for mines, II for surface industries
2	Category: 1, 2 or 3, depending on the permitted zone
G / D	Atmosphere: G for gases, D for dusts
Ex db	Type of protection and level: flameproof enclosure, level b
IIC	Gas group: IIA, IIB, IIB+H2 or IIC
T6	Temperature class: maximum surface temperature 85 °C
Gb / Db	Equipment protection level (EPL)
IIIC T85 °C	Dust group and maximum surface temperature
LCIE 03 ATEX 6146	EU-type examination certificate number

The X or U suffix

X at the end of the certificate number (e.g. LCIE 11 ATEX 3062X): specific conditions of use apply. They are given in the instructions.
U (e.g. LCIE 03 ATEX 0037U): this is a component, intended to be built into complete equipment.

ATEX marking