Support, Service
& Calibration


Technical Support

For technical support with our products, you can:

Submit a request on our customer portal

Alternatively, you can contact us by:

Freephone  0800 195 8887

Software Updates

For the latest downloads of software, drivers and any technical documents, see the Downloads page.


To help keep your instrument in prime working condition, Turnkey offer a comprehensive range of service and calibration contracts. We offer everything from a factory service right through to a full site visit, all carried out by our own fully trained engineers. For further information or a quotation, please email our service manager at:

book your servicing here 

g-meter calibration

When your g-meter or g-meter+ requires calibrating, please return it to Turnkey Instruments Ltd, 1–2 Dalby Court, Gadbrook Business Centre, Northwich, Cheshire, CW9 7TN along with the following:

  • Full return address, along with invoice address if different.
  • Contact name.
  • Telephone number.
  • Email address.
  • Payment methods:
    • Cheque made payable to Turnkey Instruments Ltd.
    • If you wish to pay by debit/credit card, we will contact you to take payment over the phone prior to the unit being returned.
  • Costs are:
    • For unit serial numbers which begin GMBxxxx: £72.00.
    • Serial numbers with GM+xxxx: £114.00.
    Prices include VAT.

Costs include a 24 month calibration with a certificate and return carriage. Just send the instrument and any accessories in its carry case with all of the above inside the case itself. Keep a note yourself of the serial number of the g-meter in case you need to check progress of the unit, and make sure you send the g-meter by carrier which lets you track its whereabouts.