This new instrument is mounted in the same handsome Plastic housing with a canted front as is our #48155 Benchtop Breathing Effort Tester. Mounted in the case is a 4.0" pressure gauge (300 psi, 1% accuracy) as well as a common quick-coupler device for attaching a regulator's BC hose. In this manner, the scuba regulator's intermediate Pressure can be examined for reliability, repeatability, and lockup. A simple pushbutton allows rapid cycling of the first stage for fast, multiple tests while an overpressure relief valve protects the gauge from unexpected first stage failures or pressure surges. A series of coupler adapters permits the attachment of different brands of BC hoses. When used in tandem with a #48155 Breathing Effort Tester, the two instruments can check most of the critical functions of a dive regulator.