The Smart unit is available with Intrinsic Safety rated as:
Note: 2G means rated for zones 1 and 2
II 2G Ex ib IIC T4 Gb for -20°C < TAmbient < 70°C (-4°F < TAmbient < 158°F)
II 2D Ex ib IIIC T135°C Db IP65 for -20°C < TAmbient < 70°C (-4°F < TAmbient < 158°F)
Atex Guidance Poster (link by kind permission of CML)
