What does "LEL" stand for on a gas detection meter?

"LEL" stands for Lower Explosive Limit, which is a critical safety parameter in gas detection. It refers to the lowest concentration of a gas or vapor that can ignite in the presence of an ignition source when mixed with air. Understanding LEL is essential for ensuring safety in environments where flammable gases may be present, such as in wastewater collection systems or other industrial applications.

Gas detection meters typically measure the concentration of gases and can provide readings relative to the LEL. Detecting gas concentrations below the LEL means that the mixture is not flammable, while concentrations at or above this limit pose a significant risk of explosion or fire. Therefore, monitoring LEL is crucial for preventing hazardous situations, ensuring worker safety, and maintaining compliance with occupational health and safety regulations.