The Scott ACSi is an open circuit, self-contained, compressed air breathing apparatus. It consists of a back plate, padded carrying harness and pneumatic system, containing a cylinder connector, reducer, pressure gauge, whistle and demand valve. The ACSi can be configured in a number of different ways with various size single cylinders. There are also a range of variants available including Airline (AC), and Split Demand Valve Coupling (SDC). The ACSi is used in conjunction with a range of composite or steel cylinders and the choice of Vision 3, PanaSeal, PanaVisor or Promask PP facemask.
The ACSi is specifically designed as an industrial SCBA, but is also suitable for providing respiratory protection in any IDLH (Immediately Dangerous to Life or Health) environment.