# ATEX Code Definition

The ATEX code is:
| Ex II 2 G Ex h IIC T4 Gb X Ex II 2 D Ex h IIIC T135°C Db X -20 °C ≤ Ta ≤ 60 °C

Description | Value | Definition
--- | --- | ---
Equipment group | II | Surface Industry
Equipment category Group II | 2 | High level of protection zone 1 (gas) zone 2 (gas) zone 21 (dust) zone 22 (dust)
Atmosphere | G | Atmosphere containing Gas, Vapors or Mist
D | Atmosphere containing Dust
Safety design | h | Mechanical product
Gas group | IIC | Hydrogene/ Acetylene
IIB | Ethylene
Dust group | IIIC | Surface combustible dust
Max surface temperature in Gas atmosphere |  | T1 = 450°C T2 = 300°C T3 = 200°C T4 = 135°C T5 = 100°C T6 = 85°C
Max surface temperature in Dust atmosphere |  | Example temperatures: T85°C T110°C T120°C T125°C T240°C
Special restriction, for example ambient temperature range. | X |