Minimum Explosible Concentration (MEC) Testing

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Our UK laboratory generates flammable & explosive test data for your combustible dust and powders. The Minimum Explosible Concentration test is conducted to determine the minimum quantity of combustible dust dispersed in the air, as suspended dust clouds, that can form a flammable atmosphere.


The Sigma-HSE Advantage

Sigma-HSE is your single solution provider for a full range of combustible dust testing & explosion analysis testing. Our dedicated team of experts are committed to helping you ensure that your dusts and/or powders will not generate a combustible dust explosion so you can maintain workplace safety and comply with the regulators.

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Frequently asked questions

What are your Standards & Schedule of Accreditation

BS EN 14034 part 3 / ASTM E1515

What is the Minimum Explosible Concentration (MEC) test?

The Minimum Explosible Concentration (MEC) or Lower Explosive Limit (LEL) test is conducted to determine the minimum quantity of combustible dust dispersed in the air, as a cloud that will form a flammable atmosphere.

How does the Minimum Explosible Concentration (MEC) test work?

Working through a range of decreasing combustible dust concentration, a dust dispersed begins in an enclosed space (20L explosion vessel/sphere) using dry compressed air.

The suspended dust cloud is then exposed to a large 2 kJ chemical ignition source and the following dust explosion is monitored, measured, and recorded, using high-accuracy piezoelectric transducers.

Once ignition is achieved, a range of combustible dust/powder concentrations is then reduced until ignition is not possible and the minimum explosion concentration is established.

What does Minimum Explosible Concentration (MEC) data do?

Data generated by the Minimum Explosible Concentration (MEC) test is predominantly used to ensure that levels of airborne dust are kept below the minimum threshold by which a flammable atmosphere can be created and a combustible dust explosion could occur. It may also confirm if a material is appropriate for processes with an established LEV system or a set dust extraction rate.

How to get your materials tested

Receive quick and accurate testing data in just a few simple steps

Contact us

Get in touch with one of our experts so we can learn more about your specific process, unit operations and combustible dust testing requirements. We'll then generate and send you a customised quote.

Prepare & ship

Prepare your material samples and ship them to one of our globally accredited laboratories (UK or India).

Analysis & Reports

Once we've received your dust samples, we'll begin testing and analysing. We'll then create and send you an actionable in-depth report detailing the potentially hazardous properties of your materials.

Post-project support

If you need support after receiving your report, our after-project support team will be on hand to assist you with any questions you may have.

Discover our range of combustible dust testing solutions

We undertake the following combustible dust and powder tests to simulate full scale process, and process upset conditions. ​

Test your explosive dust and powders for dust combustibility

Whether your process uses wood dust, coal dust or metal dust, getting your hazardous materials tested is an important step to prevent a combustible dust explosion, flash fire or other process-related hazards. Get in touch to learn more about how we can assist you in keeping your process plant and unit operations safe from combustible dust and powder explosions.
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