What does "LEL" represent on a gas detection meter?

The term "LEL" stands for Lower Explosive Limit. This is a critical concept in gas detection and safety, particularly for monitoring flammable gases in various environments. The Lower Explosive Limit refers to the lowest concentration of a gas or vapor in air that can ignite and produce a fire or explosion when an ignition source is present.

Understanding the LEL is essential for safety in industrial and municipal settings where the potential for explosive atmospheres exists. A gas detection meter measures the concentration of flammable gases and compares it to the LEL to determine whether the environment is safe or if there is an elevated risk of explosion. When the measured concentration approaches the LEL, it indicates a dangerous situation that requires immediate attention and action to prevent accidents.

This measurement is crucial for personnel working in the field to ensure they are operating in a safe environment and to comply with environmental safety regulations. Other terms listed do not accurately describe this critical safety parameter related to explosivity in the atmosphere.