Installations and explosion-proof E & I equipment must be periodically inspected in accordance with standard NEN-EN-IEC 60079-17. In addition to the periodic inspections, there is the possibility to inspect on the basis of continuous supervision in combination with maintenance and sampling. For non-electrical equipment regulations are not that explicit . We would like to discuss with you our vision on inspection, the starting point is not to make any concessions regarding safety. On the other hand, inspecting your installation must be pragmatically adjusted, especially if this installation is already a bit older.