Geneq > Materials testing > Concrete

Impact-Echo Based Concrete Thickness and Flaw Gauge
model CTG-1TF


You no longer need to drill, core or excavate to determine concrete slab thickness using our
The CTG line of instruments are hand-held, battery powered, nondestructive systems for measuring the thickness and integrity of concrete slabs, pavements, tunnel linings, walls and other platelike structures using the Impact Echo principle. Requires no special knowledge or training — use it right out of the box with Olson's built-in default concrete parameters, or for greater accuracy, simply calibrate the CTG by testing a point of known concrete thickness as a reference for the speed of sound in that concrete and start testing!

Verify concrete pavement thickness in 1-Easy step !
CTGTM Features
  • Ruggedized, hand-held test head with integrated displacement transducer and solenoid impactor
  • Switch between English (inches) or Metric (centimeters) units with the click of a button
  • No coupling agents required for use of test head on concrete
  • Easy velocity calibration at known thickness location, or use Olson's default parameters
  • Works on cured, hardened concrete in air or on grade
  • Download test time/date and results into your PC through serial port
  • Works through paint and most types of bonded tile (checks tile bonding too!)
  • Thickness data table can be imported into most spreadsheet programs
  • Easy to read LED display for outdoors and switchable backlight for indoors
  • Save selected test time/date and spectral thickness results for later review

IMPACT-ECHO BASED CONCRETE
THICKNESS AND FLAW GAUGES
SURFACE WAVE (SW) VELOCITY OPTIONS
The SW models incorporate the capabilities of our existing CTG-1T, and includes a detachable 20cm long arm to the front of the test head with a second displacement transducer to also allow for Spectral Analysis of Surface Wave (SASW) testing. The advantage of the CTG-1T-SW Model is that it can check concrete quality/velocity from one side without having to know the thickness of the concrete being tested, which is required for backcalculation of the IE velocity in the CTG-1TF model. The CTG-1T-SW will display surface wave velocity (Vr) vs. wavelength (l) on its screen (see below) and the calculated IE velocity (V) with a quality factor for the uniformity of the result of measuring an average velocity for the concrete depth of interest. The CTG-1T-SW can be used for correlating strength vs. velocity in the field to laboratory tests of concrete specimens (cubes, beams or cylinders) with Impact Echo (IE) or Ultrasonic Pulse Velocity (UPV) measurements. The CTG-1TF-SW Model combines Impact Echo (IE) thickness and flaw detection with SASW velocity measurement for the most powerful concrete thickness, integrity, and quality gauge in the world! This option includes our WINTFS-IE and WINTFS-SASW software for IE flaw/velocity analysis.

Available

CTG THICKNESS/FLAW GAUGES*
Standard Model CTG-1TF™
Enhanced Feature Models for the CTG-1TF™:

  • CTG-1TF™ + Super Thin (ST)
  • CTG-1TF™ + SW Velocity Option (SW)
  • CTG-1TF™ + (ST) + (SW)

     *Same equipment as thickness gauges, but with
    enhanced software capabilities. The “F” indicates
    FLAW capabilities in product identifications.

The CTG gauge can be used overhead, on a wall, or attach the
telescoping pole for use on flatwork and hard to reach places

CTG-1TF-SW Vr vs l for V calculation in IE