
The Profometer PM8500 is the most complete half-cell solution for rapid onsite mapping of corrosion potential in reinforced concrete.
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.
Technical data sheet for the PM8500 half cell potential mapping system.
Printable GPR Augmented Reality Marker, for use with AR Grid Scans.
Quick reference guide for PM8500.
Operation manual for the PM8500 corrosion mapping system.
Screening Eagle Technologies have expanded their concrete portfolio with an advanced digital-first solution to one of the biggest challenges of the built world today – corrosion.
The light and wireless design with unique wheel electrodes enables the world’s fastest data acquisition with real-time data visualisation and analytics.
The state-of-the-art sensor comes with the powerful Profometer app software with a flexible, customisable grid, capable of handling up to 10’000 square meters scan capacity. Together, the sensor and software make the PM8500 an effective solution for any type of corrosion inspection on concrete structures such as underground parking columns, walls, slabs or bridge decks.
The half-cell method is used to identify active corrosion of rebars based on the electro chemical properties of reinforced concrete. All the Proceq electrodes (rod or wheel) are based on a Copper/Copper Sulphate (Cu/CuSO4) half-cell.
This is why the PM8500 voltage input range allows also the connection of Silver/Silver Chloride (Ag/AgCl) electrodes or Saturated Calomel (Hg/Hg2Cl2) reference electrode. The standard cable supplied may be connected to most third party rod electrodes.

Data is collected in the Profometer app for iPad, the very same application used for the Profometer PM8000 Cover Meter and rebar locator.
From there data is synchronised with Workspace, the cloud data storage system for all Proceq / Screening Eagle Technologies test systems.
For users who need to integrate Potential Mapping with other investigations, such as visual inspection, cover measurement, and laboratory reports, the latest version of Screening Eagle INSPECT will store PM8500 sensor data and allow for visualisation to be overlayed on 2D view maps of a structure.
Measurement Modes
Review Modes

The detection of the regions where active corrosion begins involves the measuring of the localized negative values of the half-cell potential (i.e. corrosion potential).
When using a rod electrode the user has to define a grid fine enough not to miss any local negative peak, while the use of a wheel electrode on the PM8500 ensures a new level of accuracy.
The wheel system is fast enough to measure the electrical potential continuously along its linear paths, ensuring the most negative measured value will always be recognized and stored with its associated location.
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
Book a Structural Assessment Demonstration
GS9000 cart with:

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