Wall Thickness Measurement of Corroded or Coated Surfaces

The small and light ultrasonic wall thickness gauge SONOWALL 60 works according to the multiple-echo-technology. Equipped with an automatic probe recognition, it measures reliably and accurately through paint and protective layers. The SONOWALL 60 reliably inspects ships, pipes, tanks, pressure vessels, machine, and steel components.

Advantages at Glance

  • Precise and reliable measurement on rough surfaces
  • High reproducibility
  • Robust, waterproof construction
  • Deep-coat mode: measure through plastic up to 20 mm
  • No zero-point adjustment necessary
Also available with special ultrasonic probe for thick plastics and composites!

Ultrasonic Probes (selection)

  • SW2-11 (2 MHz)
  • S5A (5 MHz)


  • Sheet pile measurement

  • Wall thickness measurement of coated pipes

  • Wall thickness measurement of coated metal structures


Technical Data

MaterialsSound velocity between 2 000 m/s and 7 000 m/s
Measurement Range3 mm ... 250 mm with 2.25 MHz in steel, 1 mm ... 50 mm with 5 MHz in steel
Accuracy±0.1 mm or ±0.05 mm (selectable)
Resolution±0.1 mm or ±0.05 mm (selectable)
Battery2 x AA, optionally rechargeable batteries NiMH / NiCD
Size85 mm x 115 mm x 25 mm
Weight275 g
Ambient Temperature-10 °C ... +50 °C
Protection ClassGauge: IP65, Probe: IP67
Scope of DeliverySONOWALL 60 gauge, protective silicone sleeve with adjustable neck strap, standard probe, probe cable (1.5 m), accessory pouch, containing couplant gel, spare membranes, membrane coupling oil, 15 mm (or 1 ") test block, batteries, operating manual, carrying case

Sven Fromm, Managing Director at Clever Marine Services Ltd, about our NDT products

Clever Marine Services Ltd uses SONOWALL 60 from SONOTEC for ultrasonic wall thickness measurements and SONOSCREEN ST10 for weld seam and material testing of ferrous metals. Due to the excellent manufacturing quality, we have chosen SONOTEC ultrasonic testing equipment: the full metal housing of the devices, the measuring accuracy as well as the easy operation of the SONOTEC devices and the very good customer service have convinced us."