A Breathing Apparatus (SCBA – Self-Contained Breathing Apparatus) is respiratory protective equipment used to provide a clean air supply to its wearer in hazardous, toxic, smoky, or low-oxygen environments.
Main Components of an SCBA
High-Pressure Air Cylinder
Made of steel or composite (aluminum + carbon fiber).
Contains high-pressure air (usually 200–300 bar).
Backplate & Harness
A sturdy backplate to support the tube.
Equipped with a harness (safety belt) for comfortable and safe use.
Regulator & Reducer
Regulating the pressure of the cylinder to ensure safety before it enters the mask.
Full Face Mask (Facepiece)
Protects the face and provides air to the user.
Equipped with an exhalation valve to allow waste air to escape.
Pressure Gage & Alarm
Shows the remaining air pressure in the tube.
The alarm sounds when the air is almost depleted (usually at 50 bar).
Optional PASS Device (Personal Alert Safety System)
An alarm that sounds loudly if the user doesn’t move (falls/is unconscious).


