NMO: testing facilities

Information for manufacturers.

Temporary closure of calibration laboratories during ongoing refurbishment

Due to the ongoing refurbishment programme in Teddington to upgrade all building facilities and services, the calibration laboratories will be shut down from 1 October 2021 until April 2022. During this time our statutory work will continue, however there will be an impact on our turnaround times. Local Authorities should email for further details on statutory work and estimated lead times. Non-statutory work customers should use the UKAS website to search by category for alternate calibration suppliers. NMO will be contacting customers whose goods have already been received to make suitable arrangements.

The laboratories and chambers at our Teddington site are all fully traceable to national standards, operated in accordance with ISO/IEC 17025:2005, and available for research or pre-assessment testing.

UKAS accredited testing services

Anechoic chamber

We perform RFI testing to IEC 61000-4.3. Our chamber is approximately 3 x 3 x 3 metres and can generate a frequency of 26 MHz to 3 GHz, at up to 10 volts per metre.

Environmental chambers

We perform static temperature testing to IEC 60068-2-1 and IEC 60068-2-2 and damp heat steady state and cyclic testing to IEC 60068-2-78 and IEC 60068-2-30. Our two chambers allow testing from -25ºC to 70ºC and can achieve 95% relative humidity quickly and cost-effectively. We have a walk-in chamber measuring 4 x 3 x 2.5 metres.

Electrical test laboratories

We perform burst, surge, voltage variations, dips, interruptions and conductive testing to IEC 61000 standards, and the metrological testing of measuring instruments. We also test vehicle mounted measuring equipment to ISO 7637.

Deadweight force loading rig

We perform load cell testing in accordance with OIML R60, to assist manufacturers with the development of prototypes. Our deadweight machine will produce 100 kg to 1000 kg and the chamber in which it is located allows testing from -10ºC to 50ºC.


We perform pre-assessment testing to give manufacturers confidence in their products’ ability to pass EMC immunity testing (although not limited to EMC testing).

Published 14 April 2014