A metal detector is an electronic device designed to locate metal objects hidden beneath the ground, underwater, or within other materials. It works using electromagnetic fields and is widely used in hobby detecting, security, construction, and archaeology.
How It Works
Electromagnetic Induction:
A coil generates a magnetic field. When it encounters metal, it creates eddy currents that produce a secondary signal.
Signal Processing:
The detector analyses the returned signal and alerts the user through tones, visual displays, or both.
Typical Uses
Hobby Detecting: Finding coins, jewellery, and historical artefacts.
Security: Screening for weapons in public places.
Construction: Locating pipes, cables, and reinforcement.
Industry: Detecting contamination in food and pharmaceuticals.
Archaeology: Surveying buried objects without excavation.
