What is the danger of asphyxiation set point for oxygen on an atmospheric monitor?

The danger of asphyxiation set point for oxygen on an atmospheric monitor is typically established at 19.5 percent. This threshold is significant because normal atmospheric air contains approximately 20.9 percent oxygen. When oxygen levels drop below 19.5 percent, individuals may experience symptoms of hypoxia, which can lead to impaired physical and cognitive functions, and in severe cases, loss of consciousness or death.

Monitoring and maintaining oxygen levels above this set point is essential in environments where there may be a risk of oxygen deficiency, such as confined spaces or areas where combustion processes consume oxygen. The 19.5 percent threshold serves as a critical safety measure, alerting workers to potentially hazardous conditions where asphyxiation could occur due to inadequate oxygen supply.

Setting the monitor at this level provides a buffer to ensure that even slight variations in oxygen levels do not go unnoticed, allowing for timely intervention to prevent dangerous situations.