How Do Metal Detectors Work? Metal detectors work by transmitting an electromagnetic field from the search coil into the ground. Any metal objects (targets) within the electromagnetic field will become energised and retransmit an electromagnetic field of their own.

What metals Cannot be detected by a metal detector?

Metals such as iron, nickel and cobalt are detected by passive and active metal detectors. Other metals, such as copper, brass and aluminum, are detected only by active means.

How does metal detector detect gold?

Minelab SDC 2300 Waterproof Gold Metal Detector

The Minelab SDC 2300 Metal Detector opens up a whole new range of possibilities to find more gold nuggets! This device is compact, waterproof, and designed to operate in the harshest conditions.