All bodies of water naturally contain dissolved air. In gas phase, its volume is between 1.5% to 2.5% of the water. About 35% of this air is dissolved oxygen (DO).
The dissolved air can be separated from the water by applying low pressure. This, according to Henry’s Law, which states that the amount of a gas that can be dissolved in a liquid is proportional to the pressure on the liquid. Reducing the pressure will cause dissolved gas to be released from the liquid (this is what happens when you open a bottle of soda). Reduction of the pressure will be achieved by using a centrifuge, causing lower pressure in the center. After separation the air is transferred to an air bag for use by the diver.
Research performed by the U.S. navy showed that an active scuba diver consumes about 1 liter of oxygen every minute, while a less-active submarine crew member consumes about 0.4 liters of oxygen per minute. Our devices will be designed to deliver more than the calculated flow of water and air, as safety factors that take into account stressful situation cases where more oxygen is needed, not full DO extraction, and more.