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The History of Metal Detection
Metal detectors have been around for more than a hundred years. Miners first used this device to detect ore. Since the machine was very crude, people still relied on old methods of striking against the rock in the hopes of finding this rich material.
It was only in the 1930's that scientists were able to develop a system that would alert the user if there was metal underneath when it responded to a certain a radio frequency. The device was heavy; with a battery pack placed on the person's back and with the detector held by hand.
The military found these useful during the Second World War in the search for landmines so that the area could be cleared for troops to pass. This is still in use today in troubled spots around the world to remove explosive devices and unexploded ordinance, which may kill or injure helpless victims.
More than 40 years later, people have found other uses for metal detectors. With the increasing incidents of hijacking happening in planes, vessels and other modes of transportation, security experts have installed these airports to check passengers before they get into the departure gate.
Schools, commercial buildings and other vital installations also use these devices. These are either placed in a fixed location or held by hand so that a person can be screened for weapons or bombs before entering.
But the metal detector is better known as a device to look for treasure and other artifacts. Archeologists use these in excavation sites. The type used can detect the size, weight and description of the object buried in the ground.
Those who want to do this for fun can use them at the beach, in the backyard or in a vacant lot and be happy to find jewelry, coins and other objects that are concealed beneath the earth's surface.
The versions available in the market no longer come with earphones but will just use sound to alert the uses that some form of metal is detected under the ground. When this happens, all the person has to do is put the device down and start digging to see what fortune awaits the treasure hunter.
Metal detectors have come a long way from their initial purpose of detecting
minerals such as ore and gold. The applications today are for military and civilian
use, which will continue to exist until better machines are made to replace
them.
About The Author: This article provided by stmadeveloper.com
