Individual self-contained breathing apparatus of closed cycle for underwater submergence

An individual self-contained breathing apparatus of closed cycle for underwater submergence, comprising:

• an air system, including a compensatory cylinder with compressed gas, a reducer and a manometer;
• a regenerative device including reactors with cartridges with an oxygen regenerating agent, the oxygen regenerating agent being an agent that chemically converts carbon dioxide gas into oxygen;
• a gas analyzing system, including sensors for determine the partial pressure of oxygen and carbon dioxide, the sensors are embedded between the reactors with cartridges with an oxygen regenerating agent and a breathing bag;
• a breathing circuit including a face mask, a space under the face mask, the breathing bag, a valve for releasing pressure in the breathing circuit;
• connecting air ducts for connecting the breathing circuit to the regenerative device and the air system;
• and
• carbon dioxide cylinders for additional regeneration of carbon dioxide to oxygen, the carbon dioxide cylinders connected to air ducts leading to the breathing bag.