What is the purpose of oxygen testing in a confined space?

The purpose of oxygen testing in a confined space is to ensure a safe breathing atmosphere. In a confined space, the concentration of oxygen is critical for safe occupancy. A level of oxygen below 19.5% can lead to asphyxiation, while levels above 23.5% can be considered oxygen-enriched, which increases the risk of fire and explosion. Therefore, conducting oxygen testing is essential to confirm that the air remains within safe limits for the individuals who may enter the space.

While measuring temperature, detecting flammable materials, and identifying toxic wastes are important aspects of confined space safety, they do not directly relate to the primary concern of maintaining an appropriate level of breathable air. Ensuring safe oxygen levels is the first step in protecting workers in such environments.