What You Should Know About Metal Detectors

Metal detectors are electronic tools people use to discover metal in the ocean, under the ground, or for security. Although metal detectors are often used in airports, most people think of portable devices that can be used to find metals either underground of underwater. Portable metal detectors, like all detectors, involve a connection between electricity and magnetism. This relationship forms the basis of metal detection and is an essential part of every device being used today.

Metal detectors rely on a transmitter coil that allows electricity to flow through it. As electricity flows through the transmitter coil, it generates a magnetic field. Once the metal detector comes closer to a metallic object, the magnetic field influences atoms in the metallic object. This then generates electricity within the metallic object. Any electricity generated in the metallic object generates a second magnetic field that surrounds the metallic object. The metal detector then picks up on this “second” magnetic field with its receiver oil. This receiver coil is attached to a speaker. Once the receiver coil discovers this secondary magnetic field, it sends the signal to the speaker, which subsequently sends out a click or beep.

There are different types of detectors that are used for different searches. These different detectors account for varying metals, the composition of the ground, other materials disrupting the search, and whether the detector can be used in or near the water. The most common types of detectors are All-Purpose Detectors, Coin and Relic Detectors, Gold Detectors, and Underwater Detectors. All-Purpose Detectors are general devices and search for different types of metals, while Coil and Relic Detectors are limited to smaller and mid-sized coins in areas littered with debris. Gold Detectors search for natural deposits of gold, while Underwater Detectors can find metal either on beaches or underwater. Read on DetectHiddenMetal for more ideas.