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It is the explosion protection classification of a piece of (European) equipment which can be used in an explosive atmosphere.

EEx d IIC T4

EEx = Explosion proof (certified according to European Standards from series EN 60079 or EN 50xxx)

d = flameproof enclosure (see standard EN 60079-1)

IIC = device group (Hydrogen)

T4 = Temperature calss 4 (max. surface temperature = 135°C)

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12y ago

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