Structural Diagnostics Inc.

SDI is a Worldwide Leader in the Manufacturing of Automated Ultrasonic Inspection Equipment & Systems….

Ultrasonic Inspection Equipment & Systems

SDI manufactures the most comprehensive range of ultrasonic testing systems produced by any single manufacturer in the world.

Equipment In Inventory

If you are looking for a quick solution to your Ultrasonic Testing equipment needs, check out what we have in inventory! Whether it is refurbished or new, it comes with a complete 1 year warranty.


SDI-5280 Tube Inspection System w/ Dual Test Heads and Auto-Load/Offload

SDI: Leaders in Ultrasonic Testing Equipment



Today’s pursuit of more energy efficient transportation has led to the increased development and application of advanced high strength, low weight materials. This has put an even greater demand to detect and characterize defects in these materials and the structures produced from them. The best way to do this is by using Ultrasonic Testing (UT).

At the forefront of developing innovative UT equipment is Structural Diagnostics, Inc. (SDI), . Formed in 1994, SDI has designed, manufactured, and supported advanced ultrasonic systems throughout the U.S., and is now supplying systems internationally as well. 


Our customers include many of the busiest NDT labs in the U.S., high demand Tier 2 suppliers in the aerospace and automotive industries, and even several universities who use our user-friendly equipment to teach their students the fundamentals of Ultrasonic Testing. Whether you are looking for a basic system used for in-house R&D, or a workhorse system needed to be run 24/7, SDI can offer a solution.

SDI is constantly working on R&D  to ensure we are always current with the industry’s ever-changing needs. SDI has three current UT Level III’s that can talk directly with our customers to assist with training and troubleshooting, and to fully understand their UT needs. They can then speak directly with SDI’s own software development team, who are well-versed in the needs of UT inspectors, if any software upgrades need to be developed quickly. Not having to go through a 3rd party, or someone who is not familiar with UT, ensures that SDI can move quickly to meet our customers’ needs.


  • Application specific components, mechanics and electronics
  • Upgradeable – 3D high speed curve following
  • Fast software development
  • Strong support capability
  • In depth mechanical design capability
  • Extensive experience
  • All capabilities in house
  • All intellectual property held in house
  • Worldwide support capability
  • Extensive service, maintenance, troubleshooting documentation
  • Large user base
  • Wide product range


Due to the critical nature of the inspections carried out using SDI’s equipment, there is strict control of both the equipment and operators by government and Prime Contractor approval bodies. Approval of the equipment is based on the accuracy and repeatability of the system mechanics, the electrical performance of the instrumentation and the functionality of the software. Please contact us for a list of approved products and prime approvals, including our new Eddy Current and MRO approvals.

Contact Structural Diagnostics Inc. About Your Project

Even if you are in the beginning stages of your project, contact SDI so we can share our expertise that we have gathered from over 25 years of being in business. Our friendly and knowledgeable staff will help you design the UT system that meets your exact needs.