Impact Echo

Impact Echo (IE) investigations are performed to assess the condition or thickness of slabs, beams, columns, walls, pavements, runways, tunnels, and dams.

Impact Echo (IE) investigations are performed to assess the condition or thickness of slabs, beams, columns, walls, pavements, runways, tunnels, and dams.

The Impact Echo (IE) system is designed to determine the condition and thickness of concrete, wood, stone, and masonry structural members when voids, honeycomb, and/or cracks are suspected. IE investigations can also be performed to predict the strength of early age concrete if the member thickness is known. Lastly, the IE method will provide information on the depth of a flaw or defect, in addition to mapping its lateral location and extent. An advantage of the IE method over the Ultrasonic Pulse Velocity (UPV) method is that only one side of the structure needs to be accessible for testing.

Olson's IE Models are sold as add-on systems for the NDE-DAQ, NDE 360 and Freedom Data PC platforms while the Concrete Thickness Gauge (CTG) is designed to be used with a Windows Device supplied by the user.

Data Platform Required, Sold Separately

NDE-DAQ Platform NDE-DAQ
Freedom Data PC
NDE 360 NDE 360
CTG-2 CTG-2
(Requires Windows Device)

The Impact Echo Scanner uses the IE principle, but is sold only to US Government agencies and Universities, as well as approved International sales. It is available on a consulting basis through our sister company, Olson Engineering.

Applicable On:
  • Beams
  • Bridge Decks
  • Columns
  • Dams
  • Pavements
  • Pipes
  • Post-Tensioned Ducts
  • Runways
  • Slabs
  • Tunnels
  • Walls
Test For:
  • Cracks
  • Delaminations
  • Honeycomb
  • Thickness
  • Voids
Meets ASTM:
  • ASTM C1383-04
Meets ACI:
  • N/A

Key Features & Specifications

Economic solution for users who already own either a Freedom Data PC or NDE 360 Works through paint and most types of bonded tile
Thickness accuracy ± 2% at high resolution when calibrated on a known thickness, English or Metric units can be used System is compact, durable, and easily transported allowing for multiple tests per day
Save selected test time/date and spectral thickness results for later review Real-time waveform display while testing
No coupling agents required for use of test head on concrete Software allows for more sophisticated processing
Easy velocity calibration at known thickness location Works on cured, hardened concrete in air or on grade

Hands-on training is available for all of our NDE test methods at our Wheat Ridge, Colorado (USA) location, which is a suburb located approximately 15 minutes northwest of downtown Denver. Training may be available at your location by one of our agents/engineers upon special arrangement.


Save money! Contact Olson when adding on to an existing system, or purchasing multiple systems as some of the components are common to other test methods.

For complete details about any of our products, call our toll free number at 1-888-423-1214 or email Olson Instruments: