The Poseidon SE7EN is an example of technology at its best; taking a complex process and making it beautifully simple. So simple, in fact, that the SE7EN diver can just enjoy the dive! Throughout the dive, Poseidon safety technology is monitoring the oxygen sensors to ensure that they are working perfectly. A three-level alarm system is there to alert the diver and buddy if something does not go according to plan.
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Image courtesy U. When you breathe out, the exhaled air goes out through the regulator into the water in the form of bubbles. A rebreather is a scuba device that allows you to breathe your own air over and over again and produce no bubbles.
To allow you to rebreathe your air, the device must do the following: Remove your exhaled carbon dioxide. This is accomplished through the use of a cannister of sodium hydroxide Sofnolime. The carbon dioxide gas reacts with sodium hydroxide and calcium hydroxide to form calcium carbonate solid.
Replace oxygen that you have consumed. Small tanks of pure oxygen or mixed gases nitrogen-oxygen or helium-oxygen inject fresh oxygen into the breathing loop.
Control the oxygen concentration in the breathing loop. Solid-state oxygen sensors monitor the partial pressure of oxygen in the breathing loop and send this information to a microprocessor that controls the oxygen-delivery system.
Oxygen rebreathers carry a cylinder of pure oxygen as the only gas supply. Semi-closed circuit rebreathers use gas mixtures as the gas supply. A diver using a semi-closed rebreather can go to greater depths without risking oxygen toxicity. Closed-circuit rebreathers carry both pure oxygen and mixed gases. They differ from semi-closed circuit rebreathers in the way that they maintain the oxygen concentration. Lighter weight: Compressed air is 78 percent nitrogen, so most of the weight of air in conventional scuba is nitrogen.
Less decompression: Because the nitrogen in the system, which is involved in "the bends", is kept to a minimum, decompression is less complicated and divers can stay down longer than with conventional scuba. Rebreathers are considered to be advanced scuba gear, originally developed and typically used by the military, especially the U.
Navy SEALs. Advanced and commercial divers may use rebreathers, although intensive training is strongly recommended. Keep reading for more links you might like about breathing or heading underwater.
How does a rebreather work?
Image courtesy U. When you breathe out, the exhaled air goes out through the regulator into the water in the form of bubbles. A rebreather is a scuba device that allows you to breathe your own air over and over again and produce no bubbles. To allow you to rebreathe your air, the device must do the following: Remove your exhaled carbon dioxide. This is accomplished through the use of a cannister of sodium hydroxide Sofnolime.
Best Rebreathers of 2020
Mel spells it out very clearly here, and it is a theme that is consistent throughout the book. She takes the time to not only explain how, but also why. This is of utmost importance to me if you want me to strap something on my back that can kill me in 30ft of water. How do you discuss bailout valves and full-face mask flood drills with someone to has only previously dived on a single tank, open circuit? Surely this all makes more sense to someone who has at least done some OC tech diving? Im glad it does go into a bit more depth though, as it all adds to the interest and value of the information presented. The build, pre and post dive check lists for multiple units are a neat feature and will make the book appealing and relevant to a wide audience.