Abstract: An ambient air breathing device for use in combination with a full face mask. Full face masks are intended to be sealed around periphery of the face of the wearer and, therefore, require that the wearer breath on tanked air even before such air would be necessary to sustain life. The breathing device of the invention allows the wearer to breathe ambient air thus conserving otherwise supplied air for use when needed.

Abstract: An adapter for connecting a plurality of different manufacturers' second stage regulators to commercially available full face masks for use in self contained breathing situations.

Abstract: Automated test equipment is provided that performs quantitive tests and operational checks on respiratory protective devices including self-contained breathing apparatus (SCBA). The testing device is comprised of a bench-top instrument cabinet containing electronic, electro-mechanical, and pneumatic components, a test head with the likeness of human form attached on top of the instrument cabinet, a detachable computer keyboard, and a pneumatic manifold and hose assembly. With the present invention, a layman operator can determine the readiness of the SCBA equipment for service. The present invention can also be used as a diagnostic tool during maintenance procedures.