Curlin Air

Curlin Air -Contactless Air-Coupled Ultrasonic Flaw Detector

The portable Curlin Air utilizes air-coupled ultrasonics and requires no surface preparation and no direct contact with the test object. It performs sensitive inspections to detect voids, impact damage, and disbonds in a wide variety of water-incompatible materials. Originally used primarily for aerospace composites, the Curlin Air is referenced specifically by major aerospace manufacturers in their published inspection procedures. It has since evolved to evaluate a diverse range of materials including propellants and wood and foam panels.

Air-coupled ultrasonic techniques are used when testing sensitive materials that are at risk of contamination during the testing processes or in situations when the cost of removing special coatings from the material to be tested is impractical. Wetting agents or powders typically used in conventional ultrasonic testing can lead to degradation of sensitive components.

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  • Standard package includes instrument, Pelican style shipping case, manual, batteries and AC charger
  • Remarkable penetrating power
  • Through transmission, non-contact
  • A-trace display
  • Alarm: adjustable trigger level, audible and visual
  • Adjustable range, delay and gain


Physical / CaseWeight6.3lb (2.9kg)
Dimensions (W x H x D)10.20in. x 5.75in. x 4.50in. (259mm x 146mm x 114mm)
Operating Temperature32 °F to 140 °F (0 °C to 60 °C)
Case ConstructionAluminum body, rubber clad
Connector typeLemo
KeypadKeypad constructionTactile membrane feedback keys
OperationalModesThrough Transmission air-coupled UT
Freq range50kHz
Cable length6ft (1.83m) standard
Power SourcePower Source5x D-sized NiMH or alkaline
Battery life8 hours (NiMH) or 16 hours (alkaline)
DisplayDisplay typeHigh-speed LCD
Display size4.75in. x 3.50 (121mm x 89mm)
CertificationCertificationFactory Calibration
WarrantyWarranty1 year
MeasurementsThickness Range1in. to 200in. (0.025m to 5.08m) in Air
Delay0in. to 199in. (0m to 5.05m) in Air
Material Velocity Range0.005 to 0.750in./μs (0.13 to 19.05mm/μs)
Pulse lengthAdjustable cycles in tone-burst
MemoryData Logger50 setups


  • Composites
  • Foam core laminates
  • Glass fiber/ carbon fiber composites
  • Far-side defects
  • Bonded honeycomb structures
  • Construction materials:
  • Drywall, plywood, particleboard, cement
  • Structural urethane foam


  • Probes
  • Yoke


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