UKAS Audit Confirms ISO/IEC 17025 Laboratory Status

Winchester, UK, 22nd March 2021.

Sigma-HSE retains ISO/IEC 17025 status

Sigma-HSE can announce that after a recent successful visit by the United Kingdom Accreditation Service (UKAS) to our Winchester based laboratory, Sigma-HSE UK has retained its ISO/IEC 17025 laboratory status.

The International Organisation for Standardization (ISO) states that the ISO/IEC 17025 certification ‘enables laboratories to demonstrate that they operate competently and generate valid results, thereby promoting confidence in their work both nationally and around the world.’

Following continued business growth in the UK over the past year, the retained ISO/IEC 17025 certification will enable Sigma-HSE UK to continue offering high-quality process safety solutions at a cost-effective price.

Dr Sampuran Singh, Sigma-HSE CEO comments: “We are delighted to have retained our ISO/IEC 17025 laboratory status from UKAS. We are accelerating the growth of the Sigma group this year, so to have retained our laboratory status allows us to build on our cost-effective process safety solutions with absolute confidence. We believe that our depth of experience in offering renowned process safety testing solutions makes us the perfect partner for businesses both in the UK and globally.”

Sigma-HSE offers a solution to the cost and time inefficiencies of traditional process safety testing. We are the only independent testing laboratory in the UK that can offer tests to ISO/IEC 17025 standards, so you can make faster and more informed process safety decisions using our high-quality data.

You can access our confirmed detail of accreditation by UKAS here.


Sigma-HSE UK laboratories’ ISO/IEC 17025 accreditation has been maintained for the testing of powders using the following test methods;

Minimum Ignition Energy (MIE)

Determination of minimum ignition energy of dust/air mixtures

BS EN ISO/IEC 80079-20-2:2016

Minimum Ignition Temperature (MIT)

Method B – Minimum ignition temperature and Dust cloud in a furnace at a constant temperature

BS EN 50281-2-1: 1999

BS EN ISO/IEC 80079-20-2:2016

Layer Ignition Temperature 

Method A – Dust layer on a heated surface at a constant temperature

BS EN 50281-2-1: 1999

BS EN ISO/IEC 80079-20-2:2016

Minimum Explosive Concentration        

BS EN 14034-3: 2006

Determination of Pmax 

Using Annex C 20-litre sphere

BS EN 14034-1: 2004

Determination of Kst 

Using Annex C 20-litre sphere

BS EN 14034-2: 2006

Limiting Oxygen Concentration 

Using Annex C 20-litre sphere

BS EN 14034-4: 2004

Dust Combustibility

BS EN ISO/IEC 80079-20-2:2016: 7.2 using 20 litre sphere

About Sigma-HSE

Sigma-HSE provides global process safety support and solutions through a single source of expert knowledge regarding process safety in the work environment. Sigma-HSE’s broad range of consultancy services includes ATEX/DSEAR Assessments, HAZID/HAZOP Studies and SIL/LOPA Assessments. Sigma-HSE’s laboratories work to ISO/IEC 17025 quality standards and provide quality, reproducible results at competitive rates.

Media Contact:

Sam Ayres

Business Development Executive

[email protected]

+44 (0)7719 360385 or +44 (0)1962 840570

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