Month: May 2011

The maximum concentration of a gas or vapor that will burn in air is defined as the Upper Explosive Limit. Above this level, the mixture is too “rich” to burn.

The minimum concentration of a particular combustible gas or vapor necessary to support its combustion in air is defined as the Lower Explosive Limit for that gas. Below this level, the mixture is too “lean” to burn

Lowest concentration of a fuel by volume mixed with air that is
flammable