Proceq Profometer 6 Half-Cell Potential Meter

TRSC uses the Profometer 6 half-cell module on condition assessment engagements that require localisation of active corrosion zones — typically facade investigations on marine-exposed concrete, basement walls in chloride-contaminated soil, and post-disaster assessments where corrosion progression following water ingress must be quantified. The half-cell potential map is interpreted per ASTM C876 thresholds: potentials more negative than -350 mV (Cu/CuSO4) indicate >90% probability of active corrosion at the time of measurement; potentials less negative than -200 mV indicate <10% probability. The intermediate zone requires interpretation against parallel data (resistivity, chloride profile, visual condition). Operational notes: the electrical connection to the reinforcement is critical — TRSC drills a small access hole and exposes a single bar with a clean abrasion to provide reliable electrical continuity; without confirmed continuity the readings are invalid. The reference-electrode contact requires a saturated wet sponge or felt pad against the concrete surface, with the survey conducted in moisture conditions consistent across the survey area. Recent deployment includes Marina Mirage marine concrete investigation (half-cell map correlated with chloride profile and resistivity), 12 Creek Street facade survey, and selected Q1 Tower spire-zone investigations. The Inspect cloud workflow also enables TRSC to overlay the half-cell potential map with the parallel resistivity and chloride-profile datasets in a single visualisation, supporting both the engineering interpretation and the subsequent client conversation — clients respond materially better to a single map showing all three corrosion indicators in the same view than to three separate datasets that they have to mentally combine themselves.