Concrete Thickness Gauge

The Concrete Thickness Gauge (CTG-2) is a hand-held, battery-powered, non-destructive testing system that uses the IMPACT ECHO principle to accurately measure concrete thickness and assess internal integrity. Ideal for a wide range of applications, the CTG-2 makes concrete inspection fast, simple, and precise, without the need for coring, drilling, or excavation.

No special training is required to operate the CTG-2. Simply connect the device to your Windows® 7–10 laptop or tablet* and launch Olson’s WinCTG2 software to begin testing. For higher accuracy, calibrate the CTG-2 at a location of known thickness to determine the precise concrete velocity for that structure. *Tablet not included.

Key Applications:

• Elevated Slabs (e.g., Bridge Decks, Parking Garages)
• Slabs on Grade (e.g., Roads, Runways, Floors)
• Tunnel Linings and Concrete Pipe
• Ceilings, Walls, and Precast Panels
• Columns, Beams, and Foundations (up to 6 ft thick)

Features:

• Automatic and Manual Thickness Picking
• Concrete Velocity Calibration
• Data QA via Time & Spectral Displays
• Test Grid Setup with X/Y Coordinates
• Summary Table Export in CSV Format
• Works Through Paint, Epoxy, and Most Bonded Tile
• English or Metric Units with One-Click Switching
• Rugged Hand-Held Test Head with Integrated Sensor and Solenoid Impactor
• No Coupling Agents Required

Technical Specifications:

• Thickness Range: 3.2"–20" (Standard Mode), 20"–6' (Thick Mode)
• Accuracy: ±2% when calibrated
• Sampling Rate: 45,454 samples/second
• Frequency Resolution: 10 Hz
• Max Nyquist Frequency: 22,700 Hz
• Samples per Test: 4,545
• Test Head Cable Length: 3 ft (91 cm)
• Weight: 5 lbs (shipping), 1 lb (test head)
• Power Source: CR123A 3V long-life lithium batteries

Software Capabilities:

• Automatic/Manual Thickness Analysis
• Real-Time Time-Domain and Frequency-Domain Displays
• Easy Velocity Calibration Tools
• Results Exportable to Spreadsheets for Report Generation

Compatibility:

• Compatible with most Windows® 7–10 devices
• Works on cured, hardened concrete of various structures
• Add-on Impact Echo testing available for Freedom Data PC and NDE 360 platforms