Laznicka explains that a metal detector operates by emitting electromagnetic fields by way of a search coil, which interacts with the bottom to Find metallic objects. If the coil encounters metal, it induces eddy currents in the thing, making a secondary magnetic field that the detector’s receiver coil picks up. https://lorenzohwswu.blogdosaga.com/32708376/facts-about-beach-metal-detector-revealed