Richard Marshall Laboratories is an English Company that brings together consultancy, design, and UK manufacture.

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

 We build on our understanding 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.

Our founder has a strong background in innovative system and product design as well as first-hand experience of creating and implementing standards.  The Company treads a firm path between innovation and standardisation, and offers well-documented products with professional local backup.

            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.

            We do not sell from this website but from an understanding of customer needs.  Please write or email.


Richard Marshall Laboratories ,  The Dappled House,

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


 VAT registration GB 745 3718 18


Many RML products may be hired from

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