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Ambient conditions
Explosion-proof devices must be used in plants where potentially explosive atmospheres are likely to occur. These devices are designed so that they will not act as ignition source. They do not generate ignition sparks or hot surface temperatures.
Certification is performed in close collaboration with national and international certification bodies. The table below lists the various approvals of AUMA devices: ATEX (Europe), IEC (international level), and FM (USA).
ATEX (Europe)
Ex de IIC/IIB T4 or T3 Ex d IIC/IIB T4 or T3
IEC (international)
Ex de IIC/IIB T4 or T3 Ex d IIC/IIB T4 or T3
FM (USA)
FM CLASS I DIV 1 GROUPS (B), C, D T4 (T3C) FM CLASS II DIV 1 GROUPS E, F, G T4 (T3C) FM CLASS III DIV 1 T4 (T3)
Moreover, further approvals apply to the following countries: