Metal Detector

Treasure hunting is an enjoyable hobby that sometimes delivers rich rewards. In just the past few years, several hunters have discovered ancient treasure worth millions of dollars, and countless more have found coins and jewelry at their local parks and beaches. By listening carefully to the sounds it creates when moved across the ground, you can roughly determine what is buried beneath it. Most of the time, the object turns out to be some worthless piece of junk like a beer bottle cap, but you will occasionally find something that makes up for all the time wasted digging up junk. The metal detector is the main tool used by treasure hunters, but it is also used by some professionals in their work.

The wide range of treasure you can find with a metal detector is simply astonishing. It takes very little time to find a handful of coins, and you can easily make good money if you know where to look. Rings and bracelets are also easy to find but larger items of jewelery are less common. People often bury their valuables in the sand when they go for a swim and then forget where they put them, but it does not take long for someone with a metal detector to find the valuables again. Part of the enjoyment of treasure hunting is that you never know exactly what is going to turn up.

Besides hunting for treasure, there are plenty of other uses for a metal detector. It can be used to find water and gas pipes that are not marked on a map, so long as they are not buried too deep. This could potentially save a builder thousands of dollars in repair costs, and also avoid damage to their reputation. Security staff often use a small metal detector to check people for knives and guns when the larger detectors sound an alarm. Soldiers rely on the metal detector to find land mines and improvised explosive devices (IEDs), saving countless numbers from injury or even death every year.

A typical metal detector is comprised of a wire coil, support shaft, and control box. The support shaft is joined to the wire coil at one end, and to the control box at the other end. Heavy models also have a stabilizer half way down the shaft to make it easier to hold the coil just above the ground. In most cases, the coil is actually two separate coils of wire, but there is one type that uses only a single coil. The size of the coil is an indication of the quality of a metal detector. A model with a small coil may be less expensive, but it does not penetrate very far below the ground surface.

A metal detector employs the same principles of electromagnetism that make an electric motor work. Electric current is pumped though the wire coil to create an alternating magnetic field. When the coil move over an object containing a conductive metal, changes in the strength of the field are detected by the coil. The electronics inside the control box convert these changes into audio signals, which are played through the internal speaker or a pair of headphones. The whole system is so finely balanced that it only takes a small bit of metal to cause a large change in the sound produced.

Anyone can pick up a metal detector and start using it to find things, but it takes practice to learn what the various sounds mean. With a lot of practice, it is even possible to identify various metals. Novice users inevitably spend a lot of time digging up worthless junk, but experienced users know which objects to dig up and which ones to ignore, just by the listening to the different sounds they produce. There are plenty of books that teach the basics of using a metal detector, but only by spending many hours practicing will you become good at using one.

This Metal Detector Review is Written/Updated on Feb 8th, 2011 and filed under Home Improvement. Both comments and pings are currently closed.

1 Response for “Metal Detector”

  1. nitin says:

    i want metal detector for treasure hunting detect cooper, aluminiyam, branz, silver, gold, daimand from 4 to 5 feet

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