Self-contained Breathing Apparatus (SCBA)

Two version of a SCBA device are shown here, along with one type of air bottle. A SCBA consists of a harness which securly holds an airtank, the air tank, a pressure regulator, a personal alarm, and a facemask. The air pressure regulator supplies positive pressure to the facemask, which is different from a SC(Underwater)BA device which supplies air on demand.