What gas is filled in the scuba diving cylinder?
Most recreational divers carry compressed air, with a nitrogen-oxygen ratio of approximately 79:21. Trained divers can use Nitrox 32 for high-oxygen air. The standard ratio for GUE tissue is Nitrox 32, which adds oxygen to the air (or uses another method to enrich it) until oxygen accounts for 32%. For technical diving over 30 meters, helium is required. The standard ratio of recreational diving is Triox 30/30, which means 30% helium and 30% oxygen, and the remaining gas is nitrogen. The oxygen concentration of technical diving is equal to or less than 21%. Only during certain safe stays will pure oxygen breathing be used temporarily.
Because the effects of various gases on the human body will change under high pressure. Every 10 meters underwater, the pressure increases by about one atmosphere, and the two main components of even the simplest air can be dangerous to divers. nitrogen dissolution into the body under high pressure, except for possible diving diseases due to rising too fast as well as discharge, would be narcosis at too large a depth (generally occurring at a depth of more than 30 m /4 atmospheres, but there are also relatively large individual differences), showing themselves as nitrogen narcosis, Reported dizziness, slow reaction times, loss of judgment, etc. oxygen at high pressure, if breathed too long, can cause oxygen toxicity, which can be toxicity in the central nervous system and toxicity in the lungs.
