Restricted Access Barrier System (RABS)

Restricted Access Barrier System (RABS) – a restricted access barrier system (RABS) provides an enclosed, but not closed, environment meeting defined cleanroom conditions using a rigid-wall enclosure and air overspill to separate its interior from the surrounding environment.

  • Active RABS: integral HEPA-filtered air supply
  • Passive RABS: air supply by ceiling mounted HEPA-filters.
  • Open RABS. Where there are vents in the barrier that allow air to move from the grade A to the grade B area.