It is designed for internal and external functioning under conditions of standard environment. The cap must be screwed onto the frame outside the inspection sequences.
The range currently comprises 3 families portholes:
- The H.VIR®, standard application window for LV and HV.
- The 85 H.VIR kind EXR ®, Application in explosive atmospheres, mines and surface facilities.
- The H.VIS Electric Eye® exclusively visible application or in its version Honeycomb for IR in the LV area only.