Tusa RS-790 Cold Water Scuba Diving Regulator 1st & 2nd Stage

• Balanced diaphragm first stage with anti-freeze system
• Dry ambient pressure chamber ideal for temperatures below
  50°F/10°C
• Ribbed section to increase heat transfer and resist freezing
• Two H.P. ports and Four L.P. (2 standard/2 high flow) ports
• High flow L.P. ports offer up to 15% increase in air flow
• DIN version available as RS-790 DIN (300bar/4350psi)
  

• Lightweight, compact composite case design
• Pneumatically balanced system
• Venturi adjustment lever
• Ortho-consciously designed mouthpiece
  

The RS-790 delivers performance, durability and comfort making it the ideal choice for discerning divers.

The R-700 is a balanced diaphragm first stage designed for cold-water use, it features a dry ambient pressure chamber that prevents water contact with the diaphragm maximizing performance in temperate water conditions below 50°F/10°C.  Additionally, the R-700 has an external rib section that nearly doubles the surface area for thermal exchange further reducing ice formaton that can lead to freeze up in extreme conditions.  The R-700 has two high pressure ports and four low pressure ports including two high flow (HF) that deliver up to a 15% increase in air flow.  It is available in both INT (yoke) and DIN versions.

The S-90 second stage is a compact pneumatically balanced system that features a composite housing which insulates and protects under extreme cold-water conditions.  The S-90 is equipped with a built-in venturi adjustment lever allowing the diver to select a surface or minimum setting reducing possible free flow or a dive setting for maximum air flow during the dive.