How the Search Coil Works? There are mainly three kinds of search coils among the VLF detector in the market: double-D coil, concentric search coil and small concentric search coil. So, what are the differences between them?
With a handy metal detector you can check beforehand whether there are metal objects in a wall, ceiling or floor. An LED indicates if a metal object is in the vicinity and keeps your simple home projects, simple and safe.