Semantically, the term breathing apparatus implies any set of equipment and materials specifically intended to enable or facilitate … See more

The user respiratory interface, also commonly referred to as the facepiece, is the delivery system by which the breathing apparatus controls breathing gas flow to and from the user. The choice of interface type and the fit can significantly influence convenience, … See more

At extremes of ambient pressure, the user must be isolated from the environment to survive, as in single atmosphere diving suits, where the occupant is kept at surface … See more

Breathing apparatus may be used to providing gas suitable for breathing in a range of applications where the ambient environment does … See more

Supplied gas breathing apparatus can be categorised by how the gas is supplied to the user. There are several combinations of options See more

Breathing apparatus may be used in various pressure regimes: hyperbaric for diving, tunneling, and caisson work, normobaric where … See more

Positive and negative pressure systems can have slightly different meanings in the context of breathing apparatus depending on whether the context is medical or non-medical applications. See more