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WebJun 30, 2024 · In summary, BS EN 12024:2014 ( European Standards) sets these limits for breathing air testing: → Oxygen content (v/v) of 19.5% – 23.5%; → Hydrocarbon (condensed) content of 5 milligrams per cubic meter of air or less; → Carbon monoxide (CO) content of 10 parts per million (ppm) or less; → Carbon dioxide (CO2) content of … WebFeb 22, 2011 · On Earth, we have a constant supply of fresh air. We breathe in oxygen and breathe out carbon dioxide. These gases get recycled by plants through the process of photosynthesis. The plants … WebBreathing Air Systems is the nation's largest supplier of BAUER compressors and related breathing air equipment. We also have the industry's largest and most renowned compressor service and parts department, and a full staff of factory trained and certified technicians to assist you. We can service every make and model compressor in the ... grig software compare it