A measure of a gas or vapor in air, given an ignition source, such as arc, flame, or heat, capable of producing a flash of fire. Lowest concentration as a percentage versus normal air. Lower than LEL concentrations are ‘too lean’ to burn. Also known as lower flammable limit (LFL).
Link to This DefinitionDid you find this definition of LOWER EXPLOSIVE LIMIT (LEL) helpful? You can share it by copying the code below and adding it to your blog or web page.
Written and fact checked by The Law Dictionary