Magnetostrictive Sensory System (MsS) Guided Wave Testing (GWT)

Magnetostrictive Sensory System (MsS) Guided Wave Testing (GWT) is a nondestructive inspection method that electromagnetically generates and receives low frequency ultrasonic guided waves. The system generates tone-burst omnidirectional electric pulses into probes and detects magnetic induction changes in the material, identifying areas of corrosion. The signal received from both directions of pipe are then analyzed and reported with data analysis and reporting software.


Click here to read our article, “Advancements in CUI Detection and Overview of MsS Guided Wave,” featured in the November/December 2016 Issue of Inspectioneering Journal.

MsS provides rapid coverage for long-range areas, and can also be used to inspect otherwise inaccessible assets, such as buried or roadway piping. Because it provides rapid, expansive coverage, MsS GWT can be used as a screening tool, identifying suspect areas of corrosion that will need to be further monitored and inspected.


1. Broad Frequency Range of 5KHz-250Kh

  • Increased nearfield resolution (dead zone length of only 4″)
  • Identification and assessment of pipe supports with use of higher frequencies (u-bolts, pipe supports and other geometric features have less effect on wave propagation, i.e. attenuation)
  • Full volumetric coverage

2. Minimal Ground Clearance Required

  • Less than one inch clearance needed.

3. Reliable Findings & Reporting

  • Able to locate discontinuities as small as 2.5% of the cross-sectional wall thickness (remaining wall percentage of component/piping inspected is included in final report)
  • Advanced detection software limits false calls (dynamic calibration software features)

4. Corrosion Under Insulation (CUI) Detection

  • CUI detection on both carbon and alloy materials
  • Large coverage area, with omnidirectional scans
  • Ability to inspect in-service equipment (i.e. operating ability with temperatures up to 500 degrees C)
  • Ability to be installed as a permanent CUI monitoring system

5. Other Applications

  • Buried piping – i.e. soil to air interface
  • Tube exchangers
  • Crack detection
  • External Stress Corrosion Cracking (ESCC) on stainless steel

6. Sectorial Scan Abilities

  • Spot corrosion inspection
  • Saddle support
  • Fire proofing
  • Elbows

7. Piping & Equipment

  • MsS GWT can detect corrosion in piping, pressure vessels, and storage tanks.

Interested in Learning more? Reach out to us with your questions, or to schedule a demo!