What term describes the area between the lower and upper explosive limits?

The term that describes the area between the lower and upper explosive limits is known as the explosive range. This range defines the concentration of combustible gases or vapors in the air that can support combustion if an ignition source is present. It is critical for safety because only within this range is there a potential for explosion; concentrations below the lower explosive limit (LEL) indicate insufficient fuel for combustion, while concentrations above the upper explosive limit (UEL) indicate insufficient oxygen for combustion. Understanding this range is vital for confined space rescue technicians in assessing risks and implementing safety measures in environments where flammable gases might be present.