Instruments in the EU may be shipped as usual to Turnkey for service. Please ensure these are sent as temporary exports/imports.

Sending your unit back us from outside the UK? Check this guide.

Turnkey remains open for service, calibration and new orders throughout the lockdown period and beyond. More details here.

Connecting brake testers to the MTS system

To connect your g-meter, g-meter+ or BrakeSafe for use with the DVSA’s MOT Testing System (MTS), see the instructions here.

This describes how to set up the Brake Testing App on a mobile device, using your client ID and key files received from the DVSA.

COVID-19 Precautions

Turnkey is following advice given to businesses by HM Government Public Health England and, as the situation stands, we remain open for business.

To minimise risk, we are taking the following precautions:

  • Some of our staff are working from home but our manufacturing, service and calibration teams are continuing to work with safe distancing in our factory.
  • Orders are being fulfilled and new instruments are being shipped as normal.
  • We are still accepting deliveries of instruments, preferably via a courier, for service and calibration.
  • We are currently receiving a normal service from our couriers.
  • Where possible, please contact us with enquires by email or phone. Only visit in person if absolutely essential. We are taking extra precautions with person-to-person contacts. If you are not feeling well, please delay visiting until you are feeling better.
  • Our technical help desk remains open and our AirQWeb site is fully supported.
  • You will find a wealth of information on the goods and services we provide by referring to our website –
  • The Government’s advice is continuing to evolve on a day-by-day basis, and we will provide further updates via email and blog.

If you have any questions, please get in touch by calling the office on 01606 330020 or email us on one of the following email addresses: or

Why choose Turnkey

Turnkey is a leading developer and manufacturer of environmental monitoring instrumentation and brake testing and vehicle compliance testing equipment.

All of our monitoring and testing equipment has been developed in-house by our skilled engineers. We pride ourselves on creating accurate, reliable equipment which is practical and user friendly.

Manufactured in-house

All of our instrumentation is developed by our in-house, specialist engineers. This means we can offer a complete service which begins with an initial enquiry and supports our customers through training (if required) as well as fulfilling all servicing and calibration requirements.

Nobody knows and understands our products better than we do and we are always on hand to answer questions, offer technical advice and help.

We carry out all servicing and calibration for our range of environmental monitoring equipment as well as for our brake testing and vehicle compliance kits.

Our teams of talented product engineers are the best people to carry out servicing, repairs and calibration because each piece of instrumentation was developed and manufactured by Turnkey’s own engineers so we really do understand every nut and bolt!

User friendly

Our products are used by police forces, local authorities and other agencies in the UK and around the world. Some of our instruments were developed in collaboration with police forces or other end users, this has led to testing equipment which works exactly as required by the end users and generates the accurate results in a practical, usable format.

Many of our monitors are supported by our software and mobile apps for downloading, analysing and reporting results.


Turnkey Group holds ISO 9001:2015 certification. Where relevant, our brake testing is DVSA-approved by the GEA and TÜV Rheinland certified, and the Osiris and Topas are Environment Agency MCERTS certified. Our off-road vehicle testing instruments are supplied to heavy industries, mining and quarries all over the world.

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