Accredited On-site Calibration

GNW are ISO 9001:2015 accredited and audited annually by the European Certification Group with over 40 years of accredited on-site calibration experience. Our certificate can be validated HERE.

We are also registered with Safe Contractor and Avetta.

5 Star Google Business Review Rating
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Matty Read
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Fast calibration great service would high recommended friendly helpful staff
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Andrew Maddox profile picture
Andrew Maddox
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Brilliant company, high quality work, fantastic customer service, excellent calibration service.
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Karen Ward profile picture
Karen Ward
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Great service...went above and beyond to help. Highly recommend GNW for your unique instrumentation needs.
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Ann Bowers profile picture
Ann Bowers
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Excellent service, the staff go the extra mile, would definitely recommend and won't hesitate to use again
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Sam Proctor profile picture
Sam Proctor
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These guys are awesome and will meet or exceed your calibration requirements. Excellent calibration service.
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James hilton profile picture
James hilton
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Having used this company for a number of years I’ve always been more than happy with the service. Professional & personal service is second to none & attention to detail make dealing with them a pleasure
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Radwraps Ltd profile picture
Radwraps Ltd
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Great customer service from start to finish, excellent calibration service and keeping us tip top for trading.. Would highly recommend..
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Dom Trofski profile picture
Dom Trofski
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We have always had great service from GNW, nothing is ever too much trouble and we always get our orders on time. The team are very astute on site, we never have to worry when they are here and their Excellent Calibration Service gives us all a piece of mind. Their sales department is also very easy to deal with, Shaun always looks after us 😘
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Andy Brock profile picture
Andy Brock
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Brilliant company, high quality work, fantastic customer service, excellent calibration service!
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Stephen Maddox profile picture
Stephen Maddox
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Extremely impressed with gnw instrumentation's professionalism when dealing with our calibration requirements. Would highly recommend in the future.
accredited on-site calibration
Safe Contractor
REGISTERED WITH AVETTA

Accredited Calibration

Our calibration technicians are trained to provide the highest standard of calibration when visiting your site. Each of our experts is backed by calibration accreditations from leading industry bodies. GNW understands the importance of maintaining a safe and functioning environment, which is why we deliver such a high quality service. 

Our accreditations mean that you can trust our services to meet industry regulations, GNW is accredited for ISO 9001:2015, SafeContractor, and Avetta’s Supply Chain Network. Once we’re finished calibrating your equipment, you can integrate it back into your processes with complete reliability and precision. 

Our Accreditations

Here at GNW Instrumentation, we proudly hold the following industry accreditations:

  • ISO 9001:2015 – Demonstrates our commitment to managing and improving our processes, creating a consistent level of excellence. We are audited annually by the European Certification Group.
  • SafeContractor – Recognises our commitment to health and safety standards. This accreditation standard helps contractors to demonstrate compliance with health and safety regulations.
  • Avetta’s supply chain network – As members of Avetta’s supply chain network, we have been thoroughly vetted and prequalified for our safe and sustainable business practices.


No wonder our accredited calibration services are trusted by industry-leading organisations across the UK.

Compliance and Quality Assurance

Our accreditations are an indicator of our commitment to delivering an excellent, quality assured service. By working with a supplier that holds such accreditations, our customers know they’re in the safe hands of our technicians who can get the job done accurately and efficiently. If you are comparing providers, our page on calibration qualifications and accreditations sets out what to look for, and you can see how accreditation is applied in practice in our on-site calibration process.

Benefits of Choosing GNW Instrumentation

Opting for our experts to calibrate your equipment gives you the peace of mind that the calibration will be carried out to industry standard, leaving your tools ready and working. GNW is pleased to include the latest technology in our calibration kit, so we can provide the highest quality service to your site. We know the industry inside out, and we bring this expert knowledge to every job. 

Make GNW Instrumentation your calibration provider of choice

We take great pride in being accredited for ISO 9001:2015, SafeContractor and Avetta accreditation, ensuring our customers receive high-quality, accredited calibration services that meet their requirements every time.

We understand the importance of accredited calibration across various industries and are passionate about delivering accurate on-site calibration with full accreditation and certification. With our commitment to excellence, you can feel confident that you are choosing a tried and tested calibration service provider.

Book your on-site calibration today by calling +44 (01704) 536 010 or email us at [email protected].

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