How to Read Your Metal Detector
When searching for treasure or artifacts, a metal detector can be a valuable tool. It can also be used to locate buried wires and pipes for safety when digging. However, understanding how to read your metal detector can make the difference between success and failure. Knowing four main readings – the tone, VDI, target ID, and depth – can help you become more efficient at using your detector.
A metal detector works by generating an alternating magnetic field through a coil of wire. When a piece of electrically conductive metal is near the coil, the magnetic field induced in the metal causes the detector to emit an audio signal and display a visual signal on its screen. The detector can then interpret the signal and determine what kind of object is buried beneath the surface.
The most common metal detectors are designed for coin and treasure hunting, but there are several types of models to choose from. If you’re unsure which one is right for your needs, consider consulting with a knowledgeable metal detectorist or joining a club where you can compare notes with others in the hobby. A good club will be happy to provide you with a demonstration of a variety of different units and teach you how to use them properly.
Many of today’s top-rated metal detectors come with preset search modes that allow you to customize the machine for specific types of objects. This can be particularly helpful for a beginner, as it eliminates the guesswork that comes with setting the controls yourself. In addition, a number of these modern metal detectors feature LCD screens that allow you to view your search parameters while you work.
When you’re new to the hobby, it’s important to understand how to read your metal detector’s tone, VDI, and target ID. The tones of coins and precious metals emit a strong, clear sound that’s difficult to miss. By contrast, foil and junk targets, such as screw caps and aluminum cans, produce a scratchy sound that’s harder to hear. They’re also less reliable in terms of their sensitivity and conductivity.
A VDI is a numerical reading that provides a quick and easy way to determine the type of metal object you’re encountering. This number varies by manufacturer and model, but most have a range of 0-99 or 00-99. A low reading indicates a more dense, non-ferrous metal such as lead or copper, while a high reading suggests a heavier, more precious metal like gold.
It’s also important to know the maximum depth of your metal detector, which is usually displayed on the screen. This can be a crucial factor when you’re searching near bodies of water, as the depth can depend on the composition of the ground and whether or not you have a waterproof unit.
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