The basic FIMET three-phase motors have been suitably modified to be used in environments with potentially explosive atmospheres due to dust and gas, as established by directive 94/9/EC and in particular the following versions are available:

Powders

1. II 2D, zone 21
   The three-phase asynchronous motors of the M2AX, MAX and MX series, in sizes from 63 to 400, have been approved by the notified body INERIS n° 0080 and are labelled:
   IP 65, T 125 °C or T 135 °C or T 145 °C
2. II 3 D, zone 22 
   The three-phase asynchronous motors of the 3MAR series, sizes 63 ÷ 132 and of the M2AR, MAR and MR series, sizes 63 ÷ 400, are approved and certified internally and are labelled:
   IP 55, T 125 °C

Gas

1. II 3G, zone 2
   The three-phase asynchronous motors of the M2AG, MAG and MG series, in sizes from 63 to 315, have been approved by the notified body INERIS n° 0080 and are labelled:
2. II 3G EEx nA II T3, or
3. II 3G EEx nAC II T3, or
4. II 3GD EEx nA or nAC II T3 T 200 °C IP 55