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Company Profile

RN Electronics Ltd was established in 1986 by the directors Roger and Sue Ray.

In 1990 the Company moved to the present premises at Arnolds Farm Lane, Mountnessing. At that time the Company was primarily an RF design consultancy undertaking the design and development of a wide range of wireless products. The EMC test facility was set up within the site to ensure that products designed were compliant with all EMC and radio type approval requirements.

A sample of the design work includes:

VHF Video Transmitter 900 MHz Transmitter                                       
Paging Transmitters 1.8 GHz Receiver  
PMR Equipment Wide Band Amplifiers  
Personal Communicator Wireless Intercom  
ARC Detection System Power Oscillator  
2.4 GHz Spread Spectrum UHF Alarm Transmitter  

From 1993 onwards EMC and radio testing of client products became a major role of the company, using the expertise gained in product design to assist clients to achieve compliance.

Our range of testing soon expanded into coaxial cables for the satellite broadcast industry, after-market automotive components as witnessed by the VCA and medical devices.

The company’s strong RF focus continues today with our experienced RF engineers.

Key Milestones


First chamber in site A opened.


We developed the RNE678 benchmark for coaxial cables used in satellite broadcast reception, which was adopted by the Confederation of Aerial Industries (CAI).


We expanded our test facility, incorporating Cambridge Test and Measurement Services (CTMS) into our site here in Brentwood and steadily increased our range of services, including a large indoor semi-anechoic chamber, dramatically reducing the amount of test time required on an OATS.

May 2002

The Company became a UKAS accredited Testing Laboratory no.2360.

Oct 2003

The OATS and our large semi anechoic site M chamber were FCC listed. Hired two additional EMC engineers.

Feb 2004

We welcomed Paul Darragh as our Test Manager, to take over the daily running of the test facility.


Started testing "shotgun" (twin) coaxial cables.

Dec 2007

Opened a new anechoic chamber for automatic antenna RPE measurements.

Mar 2008

Received UKAS accreditation for automotive testing.


Appointed as a Technical Service by the VCA.

Jan 2010

Appointed as a MET auditor for factory inspections of listed products (safety approved for use in the USA).

Aug 2010

A new safety laboratory for R&TTE Directive, LVD and medical devices, and a new screened room for vehicular ISO pulse testing opened.

Oct 2010

Launched energy consumption testing for EuP directive standby power requirements.

Jun 2013

Took over operations of Mead Testing EMC site in Harlow, Essex.

Jun 2014

Relocation of new chamber from Harlow to RN Electronics.

Aug 2014

We expanded our test facility, incorporating the EMC side of Mead Testing into our new building which opened at our site here in Brentwood increasing our range of services, including a large fully compliant three metre ferrite lined semi-anechoic chamber.

Nov 2014

3 phase power installed.

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RN Electronics - Electromagnetic Compatibility Testing, UK Test Lab - EMC testing for all European and worldwide test standards.

Registered Address: RN Electronics Ltd, Arnolds Court, Arnolds Farm Lane, Mountnessing, Essex, CM13 1UT, UK.

Tel: +44 (0)1277 352219, Email:  | UK Registered No: 3051259, VAT Number: GB 475 2328 39

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