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The CM-3 verifies the electrical continuity of a rebar cage directly by measuring resistance with a relatively large current (0.5 Amp) through a rebar connection for 0.5 seconds.
Overview | GX1 vs GX2 | SUE & Utilities | Structures & Pavements | Software & Outputs | Case Studies | Specifications | Support
Collect high-density, georeferenced GPR data across wide areas and view the subsurface in 3D as you scan. Choose the GX2 array for SUE and utility mapping, or the GX1 array for structural, bridge and pavement investigations.
Best suited to:
Best suited to:
Recommended array: GX2
Recommended array: GX1
Cover more ground
Collect multiple parallel profiles in one pass instead of uilding a grid line by line.
See results during acquisition
View georeferenced radargrams and time-slice information in the field rather than waiting until the data is returned to the office.
Produce repeatable mapped data
Combine wheel-positioned GPR data with GNSS, project coordinates and survey linework.
Use one platform for two very different applications
Exchange GX1 and GX2 arrays without purchasing two complete cart platforms.
The GX2 transforms the GS9000 into a high-density subsurface utility mapping system. Its 11-channel, low-frequency GPR array captures an 83 cm-wide swath in each pass, helping operators detect and map buried pipes, ducts, cables, voids and other subsurface features. Live georeferenced data lets SUE teams review coverage on site and produce accurate CAD, GIS and project-coordinate deliverables.
1. Plan the survey
Load satellite imagery, CAD information, project coordinates or survey control.
2. Collect dense multichannel data
Survey an approximately 0.82 m-wide swath with 11 channels in each pass.
3. Review data live
Examine radargrams, georeferenced time slices and marked features while still on site.
4. Interpret and digitise
Add points, linework, tags, photographs and field observations.
5. Process and deliver
Merge survey areas, apply processing and export mapped information for the customer’s CAD, GIS or reporting workflow.
View the images below to see these in action.
In addition to verifying that the resistance is below 1 Ohm (ref. ISO 126969) the CM-3 also verifies the continuity check, confirming the residual voltage between the test points falls to 0 within 100 ms after the resistance measurement is complete.
A common Digital Multi Meter [DMM] is not a reliable instrument to verify reinforcement continuity. Concrete can be seen as a solid electrolyte that will generate its own small potentials. A DMM uses very small currents to measure resistance and can be influenced by the concrete potentials. The alternative and indirect method of measuring potentials between the rebars with a DMM is better and almost certain to give valid results.
CM-3 can remove the uncertainty by using a current that may be as much as 1000 times higher than a DMM. The test current applied by the CM-3 is also more in line with the level of currents that must be expected though the rebars from an ICCP installation.
A probe for easy rebar contact is supplied with the CM-2. The Probe is a spring loaded punch style contact that can penetrate surface rust.
The instrument and the probe accepts common 4 mm banana connectors, cable is not included. Resistance in measurement cables may easily be eliminated through the CM-2's calibration feature.
Book a SUE Workflow Demonstration
The GX1 transforms the GS9000 into a high-resolution structural assessment system for concrete slabs, bridge decks and pavements. Its dense, dual-polarisation array captures detailed 3D data across wide areas, supporting reinforcement and cover mapping, moisture and deterioration assessment, and analysis of asphalt and pavement layers. Live visualisation helps confirm survey coverage on site, while post-processing tools produce clear, report-ready condition maps.
1. Define the inspection area
Import the structure, bridge, pavement or survey background.
2. Collect closely spaced profiles
Capture 35 longitudinal and 15 cross-polarised channels with dense spacing.
3. Review coverage in the field
Use live radargrams and time slices to confirm that the required area has been captured.
4. Process the dataset
Apply velocity, gain, background removal, migration, filtering and topographic correction as appropriate.
5. Generate diagnostic maps
Create depth slices, reinforcement maps, layer information or application-specific condition maps.
6. Integrate with the engineering assessment
Export figures, mapped anomalies and raw data for inclusion in the engineer’s final interpretation and report.
Field information
Processed Diagnostic Information
Engineering deliverables
View some of these features at work below, and our case study if you'd like to see more of what the GS9000 can do.
Book a Structural Assessment Demonstration
GS9000 cart with:
