Performance, ergonomic reliability, and ease of maintenance make this regulator a product for true diving professionals. Instructors, guides, dive operators, and researchers will find the answer they need in the Master Ellipse.
The first stage stands out from the range of Cressi balanced diaphragm regulators because the mechanism is arranged on an axis perpendicular to the axis of air entry, creating a "T" shape. The advantages of this particular design include better arrangement of the hoses and less space occupied. Regulator is remarkably easy to inspect and access the mechanism to improve maintenance and calibration operations.
The T10 Master uses a larger, high-efficiency conical filter. The marine brass metal body is protected on the surface by a special treatment called PVD (Physical Vapor Deposition), which compared to traditional chrome coatings is exceptionally resilient to the mechanical and chemical wear caused by dives.
The balanced diaphragm, first stage regulator is inherently environmentally sealed. The benefit of this type of first stage design is that none of the delicate internal parts are exposed to contaminants such as salt, sand, chlorine or pool acids. These environmental contaminants can cause corrosion and mineral deposits to form on the internal mechanism deteriorating regulator performance. A diaphragm first stage regulator requires less maintenance then regulators that allow contaminates to enter the internal mechanism. The diaphragm of the first stage regulator forms a membrane barrier between the environment and the internal mechanism. The diaphragm membrane transmits pressure changes to the mechanism keeping the internal parts cleaner and contaminant free. The first stage regulator is equipped with 2 high pressure (HP) ports and 4-low pressure (LP) 3/8” UNF threaded ports.

The Master Ellipse second stage has installed the exceptional and proven Cressi pneumatically balanced valve to ensure minimum inhalation effort. This valve is paired with a body with metallic parts treated in PVD. What's more, the knob for adjusting inhalation effort is made of a metallic material to guarantee reliability and resistance to blows and scratches. Inhalation effort can be adjusted with an easy grip knob. The knob is designed to work even when wearing gloves and allows the diver to fine tune the breathing resistance to meet the needs of the dive environment. To further give the diver a custom breathing mechanism the regulator is equipped with a venturi switch, when placed in position (-) it functions as pre-dive mode, and helps prevent the regulator from free-flowing at the surface, when moved to (+) it allows the regulator its maximum performance. The second stage housing is manufactured from a noise absorbing techno-polymer material. The regulator weighs 31.04 oz (880 g), comes with an owner’s manual.