The ultra low profile ring or “Slinky” was specifically designed to be able to fit around pipes that have a very limited radial clearance, like those commonly found in culverts or pipe racks. Typically less than 25 mm of clearance is required to be able to mount the rings.Due to their design, the low profile rings cover a smaller pipe size range than the traditional solid rings. The standard low profile rings are configured for API nominal pipe sizes (within an API 5L tolerance).These ultra low profile transducer rings are suitable for low clearance inspection of:

  • Bare / Painted Pipes
  • Sleeved Pipes
  • Insulated Pipes

The High Definition (HD) solid rings have EFC performance and utilise the high frequency range available with the Wavemaker® G4mini or the Wavemaker® G4 with the medium frequency option (LF+MF option) for applications where higher sensitivity and resolution are required.

Such applications typically include:

  • interface penetrations
  • supports
  • localised pitting
Very Low Profile
Adjustable Spacings
Single Handle Closing

Two row transducer modules with a single fixed spacing for high frequency inspection (for welded supports).


Two row transducer modules with a single fixed spacing for mid frequency inspection.


Two row transducer modules with a single fixed spacing for low frequency inspection (coated pipes).


Number of Channels
8 to 16 Channels
Nominal Pipe Size (NPS)
2″ to 8″ (DN 50 to 200)
Operating Temperature
-40° to +120°C (250°F)
Radial Clearance
25.4mm (1″)
Transduction System Compatibility
Wavemaker® G3, G4 and G4Mini
  • Special (non-API) pipe sizes on request.
  • Spacings usually set at order time.
  • Old G3’s may need firmware updates.


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