Cal-Cert Becomes the Largest Construction Materials Testing (CMT) Calibration Provider in the U.S., Powered by Accredited Labs

Five CMT calibration brands now serve customers under one name, giving construction materials testing labs one trusted source for nuclear density gauge calibration, soil and concrete testing equipment calibration, and more.

IRVING, Texas, Sept. 30, 2026 /PRNewswire/ -- Cal-Cert™ is now the largest construction materials testing (CMT) calibration service provider in the United States. Accredited Labs has brought five of its CMT-focused brands together under the Cal-Cert name: Calser, Servo Innovations, Calibration Services Inc., ATSNUC, and Northwest Technical Services. Customers of all five now work with one company, one team, and one brand: Cal-Cert, Powered by Accredited Labs.

Earlier this year, Accredited Labs announced that its network had become the largest CMT calibration provider in the country. Cal-Cert is the next step. It takes the people, labs, and skills that made that milestone possible and puts them under one name that CMT labs can easily find and remember.

Why This Matters for CMT Labs

Construction materials testing labs test the soil, concrete, and asphalt that go into roads, bridges, and buildings. To get results that hold up to ASTM and AASHTO standards, the equipment behind those tests must be calibrated on schedule by a trusted, accredited lab.

Before this change, a CMT lab might have worked with one brand for its nuclear gauge and another for its scales or load frames. Now, Cal-Cert brings that work together. Customers get:

• One provider for the whole lab. Nuclear density gauges, soil compaction testing equipment, concrete and asphalt testing equipment, scales, ovens, and more.
• Deep nuclear gauge expertise. Calibration, leak testing, and repair for Troxler® and other nuclear density gauges.
• Accredited, traceable results. Calibration to ISO/IEC 17025 standards, backed by the national Accredited Labs network.
• The same trusted people. The same local technicians and service teams customers already know.

What Cal-Cert Calibrates

Cal-Cert supports the full range of equipment found in a construction materials testing laboratory, including:

• Nuclear density gauge calibration, leak testing, and repair
• Scale calibration and load cell calibration
• Soil compaction testing equipment, including penetrometers, sand cones, and liquid limit devices
• Concrete testing equipment, including compression machines, compressometers, air meters, and rebound hammers
• Oven, water bath, and centrifuge calibration
• Pressure transducer, vacuum gauge, manometer, dial indicator, and hydrometer calibration
• Radiation survey meter calibration

"Our customers have trusted these five companies for years. Now they get all of that experience under one name. If you run a construction materials testing lab, you can call Cal-Cert for your nuclear gauges, your scales, your ovens, and your load frames. Same great people, one team, and a lot more support behind us."
— Tony Lewandowski, Branch Manager, Cal-Cert

"Earlier this year, we shared that Accredited Labs had become the largest CMT calibration provider in the United States. Cal-Cert gives that strength one clear name in the market. The construction industry depends on accurate testing to build safe roads and structures, and we want every CMT lab in the country to know exactly who to call. Cal-Cert is that name, and Accredited Labs stands fully behind it."
— Joe Moser, CEO, Accredited Labs

A Growing Market That Demands Accuracy

Industry analysts expect the U.S. construction materials testing equipment market to reach about $3.6 billion in 2026. Growth is being driven by more infrastructure work, tighter safety rules, and stronger demand for quality testing. As more equipment goes into the field, the need for accurate, accredited calibration grows with it.

Cal-Cert and Accredited Labs are proud supporters of AASHTO and state Department of Transportation (DOT) laboratories across the country. Accredited Labs was a Platinum Sponsor at the AASHTO re:source Technical Exchange in March 2026.

Common Questions

What is Cal-Cert? Cal-Cert is the largest construction materials testing (CMT) calibration service provider in the United States. It is powered by Accredited Labs, a national network of ISO/IEC 17025-accredited calibration labs.

Which companies are now part of Cal-Cert? Calser, Servo Innovations, Calibration Services Inc., ATSNUC, and Northwest Technical Services now operate as Cal-Cert.

What does this mean for current customers? Customers will see the Cal-Cert name on their service going forward. They keep working with the same technicians and local teams they know today.

Does Cal-Cert calibrate nuclear density gauges? Yes. Cal-Cert provides nuclear density gauge calibration, leak testing, and repair, including for Troxler® gauges.

Where can I learn more? Visit cal-cert.com to request service.

About Cal-Cert

Cal-Cert is the largest provider of calibration services to the U.S. construction materials testing (CMT) industry. Cal-Cert calibrates the equipment CMT labs use to test soil, concrete, and asphalt, with deep expertise in nuclear density gauges. Cal-Cert brings together the experience of Calser, Servo Innovations, Calibration Services Inc., ATSNUC, and Northwest Technical Services, and is powered by Accredited Labs. Learn more at cal-cert.com.

About Accredited Labs

Accredited Labs is one of the largest and fastest-growing calibration service providers in the United States. The multi-brand company is headquartered in Irving, Texas. Through its network of regional calibration brands and more than 40 laboratory locations, Accredited Labs delivers more than 3,000 accredited calibration capabilities. Laboratories within the network are accredited to ISO/IEC 17025 by the American Association for Laboratory Accreditation (A2LA), the ANSI National Accreditation Board (ANAB), and the National Voluntary Laboratory Accreditation Program (NVLAP). The company serves customers in aerospace, automotive, construction materials testing, defense, energy, life sciences, manufacturing, semiconductor, and transportation. Accredited Labs is led by Chief Executive Officer Joe Moser. Learn more at accreditedlabs.com.

Media Contact

Gary Fortin
Vice President of Marketing and Revenue Growth
Accredited Labs
[email protected] | 512-203-9234
accreditedlabs.com | cal-cert.com

SOURCE Accredited Labs