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DEF STAN 59-411 EMC Testing

UK labs and consultancies for DEF STAN 59-411 testing of defence equipment.

HORIBA MIRA Limited

HORIBA MIRA operates UKAS-accredited EMC facilities (laboratory 1105) at its Nuneaton proving ground, running testing around the clock as part of the UK's largest independent automotive development centre. The company has continued to expand its EMC capability for electric and connected-vehicle testing, including work carried out alongside EM Test and its parent company Ametek.

QinetiQ Ltd

QinetiQ holds UKAS accreditation (laboratory 1936) for RF and E3 (electromagnetic environmental effects) test and evaluation work from its Cody Technology Park site in Farnborough. As one of the UK's largest defence technology companies, its EMC-related test capability sits within a much broader research and evaluation portfolio for military and government customers.

Malvern Optical Limited

Malvern Optical holds UKAS accreditation (schedule 8955) for testing across military vehicles, radar equipment and weapons systems, and separately holds Platform Level TEMPEST accreditation (CPTAS). Based on the former RAF Pershore airfield in Worcestershire, the company runs an EMC screened room and other electro-magnetic and electro-optic test facilities for defence customers across land, sea and air.

Electromagnetic Testing Services Limited

Electromagnetic Testing Services holds UKAS accreditation (schedule 4416) with a flexible scope covering commercial and automotive EMC testing, operating from Stebbing, Essex since incorporation in 1992. The lab's work spans commercial, industrial, medical, railway and military product testing alongside EMC consultancy.

AQL EMC Limited

AQL EMC traces its UKAS accreditation (number 0018) back to 1982, making it the longest continuously accredited EMC test laboratory in the UK; the company itself was formed in 1988 out of an EMC department with roots in MOD ship and submarine testing dating to the 1960s. Based in Wimborne, it tests to RTCA DO-160 (revisions C-F), MIL-STD-461 (revisions C-F), DEF STAN 59-411 and specialist HIRF/attenuation, RS105, HERO, NEMP and RADHAZ testing, either in its own laboratory or on customers' premises. AQL EMC became part of the Eurofins Scientific group in June 2023 and of UL Solutions in October 2026.

Unit 3 Compliance Ltd

Unit 3 Compliance runs an EMC test lab and consultancy from Bradford, West Yorkshire, positioning itself as a lower-cost pre-compliance alternative to larger accredited labs, backed by hands-on troubleshooting and design-for-EMC support. The company advises on CE (EMC Directive and RED), UKCA, FCC and Canadian ICES requirements alongside electrical safety, RoHS and WEEE compliance, and also offers environmental testing such as temperature/humidity and vibration/shock.

DEF STAN 59-411 EMC testing in the UK covers the Ministry of Defence requirements for the electromagnetic compatibility of defence equipment and systems. The standard is in several parts, from management and planning to test methods and limits, and contracts usually name the parts and test methods that apply.

When you shortlist, check that the lab's accreditation covers the DEF STAN 59-411 test methods in your contract, and whether it can test on a platform or at your site for large or installed equipment. Some suppliers also hold defence supplier registrations such as JOSCAR, shown on each listing.

Use the filters to narrow by accreditation, facility type and registrations, then shortlist and send one enquiry to all of them.

Related pages: MIL-STD-461 EMC Testing, Military & Aerospace Testing, TEMPEST & Security Testing.

Frequently Asked Questions

What does DEF STAN 59-411 cover?

Electromagnetic compatibility of UK defence equipment and systems, including management, test methods and limits, across several parts.

Which parts apply to my equipment?

Those named in your contract. Ask the lab whether its schedule lists the specific test methods.

Can testing be done on site?

Some labs on this page test on site or on a platform. Check the Testing Location on each listing.

What is JOSCAR?

A registration scheme used by the UK aerospace, defence and security sector to prequalify suppliers. Listings show it where the company holds it.

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