NDT Systems Curlin Air Composite Bond Tester

NDT Systems Curlin Air Composite Bond Tester

Air-Coupled Ultrasonic Flaw Detection

NDT Systems Curlin Air Air-Coupled Composite Bond Tester

The Curlin Air is a non-contact, through transmission, air-coupled ultrasonic flaw detector. With an operating frequency of 50kHz, very low compared to conventional ultrasonic testing, the system is able to detect abnormalities in the sound path through even the most attenuating materials. The Curlin Air requires no surface preparation and can penetrate up to 6 inches (150mm) of foam, wood, honeycomb and other materials with a high air volume ratio.

A transmitting and receiving probe are positioned on opposite sides of the test object by means of a mechanical yoke or a pair of magnetic wheeled carriers. The live displays show instantly if the sound path is interrupted by a defect in the material. Flaw gates and alarms can be programmed and stored for each application.

curlin air


  • Air coupled UT
  • Remarkable penetrating power
  • Non-contact, Through transmission, no surface preparation
  • A-trace display
  • Alarms: adjustable trigger level, audible and visual
  • Adjustable range, delay and gain
  • Programmable user setups

Unique Applications:

Carbon-fiber sandwich with honeycomb core:
Aerospace application for control surfaces, thrust reversers, cargo-door inspecting for skin-core disbonds or damaged core.

Space application used for heat shields-inspecting for delaminations, disbonds in highly porous material.

Metal sandwich with foam core:
A typical construction used for fire doors and walls. Inspecting for voids in the foam core.

Solid Foam:
Inspecting for cracks or voids internally.

Used extensively in the construction industry

Multiple core sandwich:
Marine composites application with multiple core sheets and glue lines between- inspecting for skin to core and core to core disbonds.


Standard Curlin Air Kit Includes:

  • Curlin Air Instrument
  • Pelican style shipping case
  • User manual
  • Batteries
  • AC Charger

Optional Accessories:

  • Probes
  • Yokes
  • Magnetic Wheeled Carriers


Physical: Dimensions: 10.20" x 5.75" x 4.50" (259 x 146 x 114 mm)
Weight: 6.3 lbs. (2.9 kg.)
Case Construction: Aluminum body, rubber end caps
Connector Type: BNC
Keypad Type: Tactile membrane feedback keys
Operating Temperature: 32°F to 140°F (0°C to 60°C)
Power Source: 5x D-sized NiMH or alkaline batteried (8-10 hrs.) or AC Mains
Display: Type: High Speed LCD
Size: 4.75" x 3.50" (121 x 89 mm)
Transducer: Type: AT1-Standard Transmitter and Receiver; 1.5" (38mm) diameter
AT2 Mini-Receiver; 0.25" (6.4mm) diameter
Frequency Range: 50kHz
Measurements: Thickness Range: 1" to 200" (0.025 to 5.08m) in Air
Velocity Range: 0.005 to 0.750 in./µs (0.13 to 19.05 mm/µs)
Delay: 0" to 199" (0 to 5.05m) in Air
Gain: 115dB
Display Modes: RF
Pulse Length: Adjustable cycles in tone-burst
Units Displayed: In. / mm
Alarms: Audible and visual alarm modes
Gates: Amplitude
Connectivity: Storage: Up to 50 setups
Output: Analog Output (optional)

Product Literature

Description Part # Saved Price Select Option Add to
Curlin Air Air-Coupled Composite Bond Tester BT-NDT-CURLINAIR Request Pricing