![]() ![]() ![]() The challenge is that the difference between 16% and 21% is typically made up of inert, odorless gases like nitrogen, argon or carbon dioxide, so the oxygen deficiency may not be noticed immediately. Oxygen deficiency at levels below 16% is dangerous for human life. The air is considered oxygen-deficient, although it is still relatively safe for short periods of time or for people who have acclimated their bodies to lower oxygen levels. When oxygen levels drop below 19.5% hypoxia (lowered oxygen levels) begins to occur. Background: Oxygen Levels in Airīy volume, dry air contains 78.09% nitrogen, 20.95% oxygen 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.Īt normal temperatures and pressures, 20.9% oxygen in the air is considered optimal for humans. Oxygen deficiency monitors or depletion alarms are critical in any room or enclosed area in which low oxygen levels can occur. If the oxygen level in the air drops below a preset value, the alarm warns occupants both inside and outside the room of the incident. The oxygen sensor continually monitors the oxygen level in the enclosed area. ![]() A fixed oxygen depletion alarm or oxygen deficiency monitor is an oxygen sensor that constantly monitors a defined space, can control third party systems, and can audibly and visually indicate an incident. ![]()
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