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LEL Detector

Model TA-2100
3 or 4-Wire Type
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Combustible Gas LEL Detector Features

Combustible (Flammable) Gases pose an explosive hazard at sufficiently high concentrations in air. The Lower Explosive Limit (LEL) refers to the lowest concentration of gas/fumes/vapors in air required to produce fire in the presence of an ignition source (flame, heat, spark). The lower explosive limit is also known as the lower flammable limit (LFL). Combustible Gas Detectors typically provide meter indication expressed as %LEL rather than %Volume concentrations. This is intended to indicate the concentration of target gas in relationship to it's explosive hazard (Lower Explosive Limit). Therefore, meters are typically ranged for the 0-100 %LEL detection range.

Common Flammable Gases

Acetone
Butane
Ethane
Ethanol
Hexane 
Hydrogen
Methane 
Methanol
Pentane
Propane 
Styrene

Many More

Definitions: LEL / UEL

LEL: The minimum concentration of a particular combustible gas or vapor necessary to support its combustion in air is defined as the Lower Explosive Limit (LEL) for that gas. Below this level, the mixture is too “lean” to burn. 

UEL: The maximum concentration of a gas or vapor that will burn in air is defined as the Upper Explosive Limit (UEL). Above this level, the mixture is too "rich" to burn.

Note: While the LEL and UEL values are generally accepted flammability limits, other factors and conditions may affect actual limits in a specific situation.

LEL Values (%Volume)

Acetone
Butane
Ethane
Ethanol
Hexane
Hydrogen
Methane
Methanol
Pentane
Propane
Styrene

Many More
2.5
1.6
3.0
3.3
1.1
4.0
5.0
6.0
1.5
2.1
0.9

UEL Values (%Volume)

Acetone
Butane
Ethane
Ethanol
Hexane
Hydrogen
Methane
Methanol
Pentane
Propane
Styrene

Many More
12.8
8.4
12.5
19.0
7.5
75.0
15.0
36.0
7.8
9.5
6.8 

Combustible Gas LEL Detector Spec's

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Combustible Gas LEL Detector

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Mil-Ram Technology, Inc.
Toxic - LEL Combustible - Oxygen - VOCs
Hydrides - Hydrocarbons - Refrigerants
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Gas &  Fire Detection Systems
Tel: 510-656-2001    Fax: 510-656-2004
Email: sls@mil-ram.com    Silicon Valley, Fremont, CA