seriousdetecting.comAnswer
May 21, 2026 - 10:37 AM
The 5.5-inch coil provides tighter target separation than the 8-inch coil, allowing you to isolate individual targets in trashy sites where multiple metal objects lie close together. Smaller coil diameter reduces the detection footprint, so you can distinguish a gold ring from an adjacent pull tab at a swimming beach or separate coins from foil wrappers on a river bottom. The tradeoff is reduced depth penetration and slower ground coverage compared to the 8-inch coil. We run the 5.5-inch coil in high-traffic swimming areas with dense target concentrations and switch to the 8-inch coil for open-water searches where depth and coverage matter more than separation.
