Global Testing Laboratories


GTL is one of the most highly accredited labs in the testing industry. Accreditations define a test lab's professionalism, breadth of capability, and quality of service - GTL is world class. View a comprehensive list of GTL's accreditations.


Scope of Accreditations


Do you need to get your compliant product to market quickly?

Welcome to Global Testing Labs (GTL)
Have you ever struggled with long lead times and even longer turnaround times?  Have you encountered issues during testing, receiving no details or feedback?  We are committed to providing sustaining support and superior customer service to ensure your products are tested efficiently and effectively saving you time and allowing you to get your products to market faster.
Accreditations and Certifications
We are a fully accredited NVLAP ISO/IEC 17025 third-party test laboratory providing EMC, Environmental, Safety and Transportation testing. To ensure your needs are fully met, we can assist in obtaining a NRTL Mark for your products through our partners, TUV SUD America and UL. GTL is a TUV SUD CARAT certified testing laboratory.  We can perform unwitnessed testing, meaning your product can move forward within our process eliminating lengthy waits for TUV presence.  This certification not only allows us to complete your testing process with greater efficiency but also demonstrates the precision and consistency of our dedicated team. GTL is a participating test facility in the UL®  Third-Party Test Data Program (TPTDP) - DA2778.  We provide UL Safety testing and datasheet packages in support of UL Mark certification providing added value with increased flexibility and decreased turnaround time during product launch.
GTL - Your Testing Solution
Global Testing Laboratories was established in 2004 with the purchase of Philips Testing Service, a Division of Philips Consumer Electronics North America.  We have provided great service and support to our customers for the past 14 years.  Our skilled engineering staff has over 40 years combined compliance testing experience to serve you, and we look forward to serving you for many more years to come. Adjacent to the Great Smoky Mountains National Park in beautiful East Tennessee, our facilities are conveniently located near Interstates 40 and 75 and the Knoxville airport.
Give us a call now so we can assist with your product testing development and implementation strategy!


GTL-Tech Marketing Announcement

Client Reviews

I have worked with the folks and facility for over 15 years, and have always found the staff to be very skilled, knowledgeable and accommodating. That said, recent changes have brought noticeable technological improvements to the laboratory. I am forever grateful to have a resource like GTL available to us, and I look forward to every visit and testing opportunity and challenge.

Gary Picou - Vice President of Quality Systems – Certification Manger, PS Engineering, Inc.

TUV SUD America is proud and very excited to have GTL as a partner lab. We have worked with GTL for many years. GTL is strategically located in East Tennessee with easy access from most of the country. With the new management in place with many years’ experience and all the fantastic improvements to the facility we anticipate a very bright future with our relationship.

Chuck Walker - Regional Manager TUV SUD America

We have just completed our second project with GTL and we are extremely happy with the professionalism, efficiency, and time of completion. GTL’s staff has been extremely helpful, knowledgeable, and communicative.

We are a company that designs and manufactures Hearing Aids and Hearing Aid Accessories. We sell these products across the globe and have shared multiple test reports from GTL. We have shared these reports with various government regulatory agencies around the world, and we have yet to have a country or region question/reject any test data from GTL. We look forward to continue working with GTL in the future.

James Adkins - Director, Mfg. and Quality, Ear Technology Corp.

GTL’s integrity in testing, accreditations and technical expertise in EMC test standards and accuracy in the execution of the tests is why I continue to look to GTL as a professional resource for due diligence third party EMC compliance testing.  Their competence and professionalism affords me with a high level of confidence in their testing and results.

Cynthia Williams - inarteSr. Regulatory Compliance Engineer/Global Design Quality Assurance, Diebold Incorporated