What is the concentration of carbon monoxide that the human body bears?

Eranntex gas detector will answer your questions: When the concentration of CO reaches 292.5mg/m3(235ppm), it can cause severe headache, dizziness and other symptoms, and the COHb can be increased to 25%; When the CO concentration reaches 1 170mg/m3(936 ppm, close to 1000ppm), inhaling more than 6Omin can make people unconscious, and the COHb is as high as 60%. When the concentration of CO reaches11700 mg/m3 (10000 ppm), it can kill people in a few minutes, and the COHb can be increased to 90%.