How Does it Work?

I have some diving students who are new to a rebreather, and I am teaching them. I gifted them one rebreather for taking courage to complete the Career Path Training. In traditional scuba equipment, while breathing in via the mouthpiece, you receive a lungful air that is fresh from the reservoir that you carry on the back. The exhaled air uses the regulator to go out into the water while taking the shape of bubbles.

What is a rebreather?

Picture of a diver with safety gear

It is a piece of scuba equipment that lets you inhale your own air all over while producing no bubbles. For the tool to make you rebreathe the air, the machine needs to carry out the following:

Get rid of the carbon dioxide you exhaled: This is attained by utilizing a sodium hydroxide canister. The CO2 gas responds with calcium hydroxide and sodium hydroxide to create a solid of calcium carbonate.

Substitute the oxygen that you take: Petite reservoirs of mixed gases or pure oxygen add new oxygen toward the inhaling loop.

Regulate the concentration of oxygen in the inhaling circle: Solid-state oxygen detectors track the biased oxygen pressure in the inhaling circle and transfer this info to a microprocessor that regulates the oxygen-delivery mechanism.

Rebreather types

There are three kinds of rebreathers;

Hollis Prism 2
  • Semi-closed circuit
  • Oxygen
  • Closed circuit

The oxygen rebreathers carry a cylinder that has complete oxygen as the sole gas supply. Actually, they are restricted to no decompression extents and bring a risk of oxygen noxiousness. The partially closed circuit makes use of the gas solution as its gas supply. Divers who utilize semi-closed rebreathers may go to higher depths minus endangering oxygen toxicity.

For rebreathers under the closed circuit type, they carry mixed and pure oxygen gases. However, they are different from the partially closed circuit rebreathers in a manner that they sustain oxygen concentration.

Advantages of rebreathers over traditional scuba

Improved gas efficiency

Traditional scuba misuses oxygen since the divers spend the total oxygen in the space that they breathe in. For rebreathers, they substitute only the consumed oxygen and hence avoiding wastage of gas.

They are lightweight: Air that is compressed is seventy-eight percent Nitrogen. Therefore much of the air weight in traditional scuba is Nitrogen. Well, rebreathers do not have to take Nitrogen together oxygen. Thus, for similar oxygen, they may be light.

Reduced decompression

Nitrogen inside the mechanism that is included in the loop is stored to the least. Therefore, decompression is less stressful. Also, the divers may be down for an extended period as compared to traditional scuba.


Rebreathers generate no bubbles or just a few. Therefore, they do not cause disturbance to the marine creatures or show the presence of the diver.

Actually, rebreathers are regarded as improved scuba tools. Initially created and generally utilized by the military. This is, especially in the United States Navy SEALs.

Improved and industrial advanced might utilize rebreather. However, intensive training is firmly suggested. Furthermore, the tools are costly. Therefore, we could say that rebreather enhances your underwater exploration.