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Metal Detector is a security gadget used to detect quantity of metal. It is mainly used for security in Malls, Airports, Multiplexes, etc. Terrorists are the number one evil for world. Bombing attempt can be detected with Metal Detector. Bombs, Guns & Weapons are made from large quantity of metal. If one founds metal detector showing large quantity of metal, he can proceed further for through checking. Metal detector is basically an Electronic Circuit. It emits Electromagnetic Waves. Electromagnetic waves, when fall on a metal, induce electric current. Electric current induces Magnetic Flux. This flux Is detected by the receiver in Metal Detector. If the quantity of magnetic flux is high, indicating more quantity of metal, suspect can be found. It is not possible to check every person by security personnel on busy places like Airport. Same is the case with Bags. Hence Metal Detectors make job easy. If security personnel found suspicious amount of metal in bag, he can check that bag only. Other bags are passed and time is saved. Metal Detectors also help to prevent smuggling of precious metals like Gold, Platinum and Silver. Metal detector is usually like a Frame of door through which persons to be checked and bags are passed. Portable versions have size of Table Tennis racquet. Today, along with Metal Detector, advanced technologies like X Ray scanning are used at Airports for advanced security. Metal Detectors are indeed a great invention. They are making task of security personnel easy and keeping our world safe.
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