LEL (Lower Explosive Limit) gas detectors are designed to monitor the concentration of flammable gases or vapors in the air and provide warnings when the concentration reaches or exceeds a potentially dangerous level.

An LEL Monitor is an instrument used to detect hazardous levels of a combustible gas or solvent vapor in air, expressed in % LEL, or Lower Explosive Limit. An LEL Monitor is also referred to as an LEL Gas Detection System, LEL Gas Detector or simply a fixed gas detection system.

An LEL Detector is an essential component of a fixed gas detection safety instrument for LEL safety and so monitors, indicates and alarms when levels of LEL exceed 0% to indicate the presence of combustible gas or solvent vapor.

Apr 6, 2020 · The most common LEL sensor you may encounter is known as a Catalytic Bead Combustible sensor. It detects gas through a process of catalytic oxidation. In layman terms, the heart of a catalytic bead sensor is the wheatstone bridge circuit formed by the two catalytic beads.

May 28, 2021 · LEL stands for “Lower Explosive Limit” and is the lowest concentration of a particular gas that has the potential to be flammable or combustible. In other words, it’s the minimum amount of gas that will catch fire or explode when an ignition source is present.

Aug 7, 2024 · What is LEL? The Lower Explosive Limit (LEL) refers to the lowest concentration of a gas or vapor in the air that can ignite and cause an explosion. For most flammable gases, the LEL is typically less than 5% by volume.

Jun 4, 2023 · There are two types of widely used LEL sensors; catalytic “Wheatstone bridge” or infrared (IR) sensors. Each type of sensor has both advantages and disadvantages. Wheatstone bridge combustible gas sensors detect gas by catalytically oxidizing the gas on an active bead located within the sensor.