When you picture a metal detector, you probably imagine a device that has a long shaft with something that looks like a small steering wheel attached to the bottom end. The user walks along the beach, ...

Why would you want to detect metal? Oh, I don't know … maybe you want to find some gold in the ground. You could dig up ALL the dirt, or you could find the location that has the gold before you dig.

Walk-through metal detectors are common security tools. They use low-frequency electromagnetic fields. These fields interact briefly with metal objects. Health agencies confirm these detectors use non ...