About Techna NDT

Techna NDT was established in 2004 to provide quality nondestructive testing (NDT) equipment for the airline industry. Our staff has more than 25 years experience designing, testing, and manufacturing NDT technologies. Located 20 miles south of Seattle in Kent, WA, Techna NDT manufactures eddy current probes, ultrasonic transducers, cables, and accessories. We also fabricate reference standards for aircraft built by Boeing, Airbus, Bombardier, and Cessna, to name a few. Our products are used around the world for inspection of commercial and military aircrafts.

As part of our continuing commitment to customer satisfaction, we have made recent managerial changes within the company and are implementing a quality control system to comply with ISO 9001 standards.

Our Mission

Techna NDT’s mission is to provide our customers with quality products, technical support, and excellent customer service that includes quick response and fast lead times. On behalf of our employees, we thank you for your continued business and loyalty.

Company History

Techna NDT’s roots are embedded deep in the pioneering work of Van Phelps, who as a Boeing engineer in the 1950s and 60s laid the groundwork for today’s eddy current probe while researching ultrasound in the company’s research & development area.

“I was involved in development of two of the five major non-destructive methods,” Phelps said during a recent interview. “My involvement at Boeing in the 1950s started out with ultrasound as a new, at that time, a new NDT method. Then later on in that same decade, I helped introduced eddy current testing into the industry.”

However, it wasn’t until more than two decades later that Phelps and a friend saw the commercial potential of these two new NDT methods. After taking early retirement from Boeing in 1984, Phelps started NDT Engineering Corporation and began manufacturing one of the first eddy current probes widely available for testing within the airline industry.

Van Phelps - Techna NDT Pioneer
NDT pioneer Van Phelps

“The thing I’m most proud of is I introduced the h-diameter miniature surface probe. They had the bigger probes but there wasn’t any way to make it smaller until I discovered that one of the objects was a ferrite bead that was used to shield the field from the coil the eddy probe used,” Phelps said. “I was able to find that and reduce the size to 1/8-inch diameter so we could see smaller cracks and have better access to difficult-to-access areas.”

“I developed this smaller probe that could see these smaller cracks coming out from around the edges. So I introduced that, and the rest of the industry copied it, and now it’s the standard probe used throughout the world.”

Twenty years after starting NDT Engineering, Phelps and his partner sold the business to Olympus Corporation, which formed Olympus NDT. Three years later, he began working with Techna NDT, a startup company formed in 2004 by his daughter Trish and son. Trish had earlier worked with NDT Engineering, specializing in ultrasonic transducers, and she continues to serve as Techna NDT’s primary expert on UT technology to this day.

At Techna NDT, we continue to walk proudly in the footsteps of Van Phelps and his groundbreaking work in the field of non-destructive testing. Our goal remains producing the highest quality reference standards, eddy current probes, ultrasonic transducers, and related accessories that are essential for ensuring the safety of thousands of commercial and private airline flights each year.