Richard Marshall Laboratories was an English Company that brought together consultancy, design, and UK manufacture of Electromagnetic Compatibility solutions.

It built on an appreciation of customer needs to provide user-friendly and cost-effective EMC and rf instrumentation for the product design laboratory and factory production line, as well as for the test specialist.

Clients for the CE marking and Electromagnetic compatibility training and consultancy services ranged from prestigious multinationals to one-man start-ups.

The founder, Richard Marshall, had a strong background in innovative system and product design as well as first-hand experience of creating and implementing standards, and his deep understanding of EMC effects led to innovation and improvements in standardisation.

            The Company’s patent rights are a major asset but, in the interests of world-wide standardisation, licences are available on a reasonable and non-discriminatory basis.

            Sadly Richard Marshall died last summer while on holiday, and Richard Marshall Laboratories has had to cease operations.   If you have any particular queries you welcome to contact


Richard Marshall Laboratories,  The Dappled House,

30 Ox Lane,  Harpenden,  Herts.  AL5 4HE, UK


Chris Marshall, by email at



Many RML products may be hired from

Our Coupler-Decoupler Networks are now made under licence and marketed world-wide by