Lower Explosive Limit (LEL) Gas concentration Calculator

Convert gas ppm concentrations to LEL percentages and assess explosion safety risk parameters per EN 60079-20-1 standards.

Purpose of this Tool: Evaluate chemical atmospheric hazards to set proper alarm thresholds on fixed gas detection sensors.

• LEL Percentage Equation:\% LEL = 100 \times \frac{\text{Concentration}_{ppm}}{\text{Gas Limit}_{ppm}}

• Volume Percentage Conversion:\text{Volume \%} = \frac{\text{Concentration}_{ppm}}{10,000}

Target Flammable Gas

Measured Gas Concentration (ppm)

10044000

Explosion Safety status

Lower Explosive Limit Percentage11.4%

% LEL Index

Gas Volume Percentage0.5000%

Vol / Vol Air

Specific Gas LEL Limit4.4%

Pure LEL Threshold

Atmosphere Warning ClassHazard Level: Warning (Action Level, check leak points)

Risk Status

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