Hilti PSC 200 Borescope Inspection Camera

TRSC uses the borescope on every investigation where GPR or impact-echo identifies an internal anomaly that cannot be definitively interpreted from the NDT signal alone. The standard workflow is: NDT survey identifies an anomaly zone, a small-diameter (typically 12 mm or 18 mm) cored hole is drilled to the depth of the anomaly, the borescope probe is inserted and visual confirmation is captured. This methodology converts an inferred NDT finding (e.g. 'low pulse velocity zone suggests delamination') into a documented visual observation (e.g. 'horizontal delamination crack 1-2 mm width visible at 110-130 mm depth, no significant corrosion product on exposed reinforcement'). The visual confirmation supports both the engineering interpretation and the eventual remediation specification (which depends on whether the void is dry / waterlogged / contaminated). Operational notes: the cored hole orientation and depth must be planned to give the probe access to the anomaly zone — vertical-down coring into a slab gives clear access; horizontal coring into a wall requires careful probe-cable management; angled coring requires probe selection that accommodates the bend radius. Recent deployment includes 12 Creek Street facade investigation (post-NDT cored verification of suspected cover-zone voids), and selected Marina Mirage marine concrete inspections (visual confirmation of internal corrosion mechanism following NDT-identified zones of concern). The borescope is also a fast-turnaround tool on construction-phase engineering engagements where unforeseen conditions emerge during demolition or rectification work — TRSC personnel can attend site within hours, drill a small access hole, capture the visual confirmation, and issue an engineering instruction the same day, avoiding the programme delay that would result from waiting for a fully coordinated NDT mobilisation.