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NDT-RAM Systems Selection Guide
Home > NDT > Semi-Auto Non-Destructive Quality Test System – NDT-SEMI

Semi-Auto Non-Destructive Quality Test System – NDT-SEMI

Resonant Inspection for Integration In-Line

Resonant inspection is a non-destructive testing technique helping to deliver 100% quality-inspected parts quickly and economically. How does resonant inspection work? Each part has a unique resonant signature that reflects its composition. Any deviation from this signature represents a structural variation. Non-Destructive Testing Resonant Acoustic Method (NDT-RAM) uses this principle to objectively discern between small differences in complex parts.

NDT-SEMI can be tailored to match your specific quality inspection needs. The NDT-SEMI system is designed to fit into an existing production line and is flexible enough to test a wide variety of parts. An industrial impactor “pings” (taps) each part with a measured and repeatable force, producing sound. A microphone then transforms the sound into an electrical signal sending it to a digital controller to determine frequency characteristics. NDT-RAM software compares those characteristics to criteria limits and accepts or rejects the part. The system interfaces with programmable logic controllers for easy integration into an existing production line.

NDT-SEMI: Semi-Automated NDT-RAM System Benefits

  • 100% Inspection - test every part prior to shipment​
  • Simple - pass/fail result is returned by the NDT-RAM system
  • Versatile - multiple part numbers can be used on a single system
  • Clean - no part preparation or messy chemicals are needed for testing
  • Adaptable - to existing process automation
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Video of the fully automated NDT-AUTO system testing parts (00:44).

NDT-SEMI System Includes All NDT-RAM Core Components:

  • Industrial impactor
  • Smart digital controller
  • Microphone
  • Industrial PC
  • Software

Support Services Available for NDT-SEMI Include

Learn More about Resonant Inspection for Non-Destructive Testing


All of the NDT-RAM systems are ideal for 100% inspection requirements of manufacturers or users of metal or ceramic parts, including powder metal, metal injection molded (MIM), castings (including ductile iron), forgings, stampings, welding, and more. NDT-RAM provides screening for cracks, chips, holes, out-of-tolerance dimensions, variations in hardness, residual stress, bonding failures and heat-treating processes. Manufacturers who can benefit from NDT-RAM technology include those that have significant inspection costs (either material or labor costs), produce or use safety-critical parts, have substantial scrap costs due to false rejects or simply want to improve their part quality.

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