Rebreathers for scuba.
A rebreather is a type of diving equipment that recycles a diver’s breathing gas, rather than venting it into the water. This allows the diver to remain underwater for much longer periods of time, as they are not limited by the supply of air in their tank.
Unfortunately the only commercially available rebreathers are made for various kinds of specialized and technical diving, and don’t yet exist simply to extend your time underwater.
A rebreather works by filtering out the carbon dioxide (CO2) that is produced when a diver breathes, and adding new oxygen to the breathing gas. This is done using a combination of chemical scrubbers and electronic monitoring systems.
Here’s how it works:
- Inhalation: When the diver inhales, the breathing gas flows into their mouth and lungs.
- Carbon Dioxide Removal: The carbon dioxide produced by the diver’s respiration is removed from the breathing gas using a chemical scrubber. This scrubber contains a chemical that reacts with the CO2 to convert it into a form that can be easily removed from the breathing gas.
- Oxygen Addition: New oxygen is added to the breathing gas to replace the oxygen that has been used by the diver. This is typically done using an electronic control system that monitors the oxygen levels in the breathing gas and adds oxygen as needed.
- Exhalation: The filtered, oxygen-rich breathing gas is then breathed back out by the diver.
- Recycling: The process of removing carbon dioxide and adding oxygen is repeated with each breath, allowing the diver to recycle their breathing gas and remain underwater for longer periods of time.
Rebreathers are typically used by technical divers, who are diving in deep, challenging environments, and require a longer dive time and a more controlled gas supply. However, they can also be used for more recreational diving, although this requires a high level of training and experience.