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Do gold detectors work through concrete?
Gold detectors, particularly standard metal detectors, have limited effectiveness when it comes to detecting gold through concrete. While they can penetrate non-metallic surfaces to some degree, concrete presents several challenges:
- Density and Composition: Concrete is a dense composite material often containing rebar, wire mesh, and mineral aggregates that interfere with electromagnetic signals used by metal detectors.
- Signal Attenuation: The depth and thickness of the concrete significantly reduce detection capability. Most consumer-grade metal detectors cannot reliably detect small gold objects buried deep within thick concrete slabs.
- Better Alternative – Ground-Penetrating Radar (GPR): GPR systems are far more effective for scanning beneath or within concrete. Unlike metal detectors, GPR uses radio waves to create high-resolution cross-sectional images of subsurface structures. While not specifically tuned for gold, GPR can identify anomalies—such as voids, metallic inclusions, or buried objects—that may indicate the presence of gold or other materials.
In summary, while metal-based gold detector struggle with concrete, GPR offers a more viable solution for non-destructive inspection of concrete-encased items.
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