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Frequently Asked Questions About Metal Detector
Here are the most frequently asked questions about the metal detector:
What is a metal detector?
A metal detector is a device used to determine the presence of metals underground. It can be used to search for gold, jewelry, coins, and other valuables.
How does a metal detector work?
A metal detector works by sending an electromagnetic signal to the ground. When the search coil passes over a metal target, it induces a return signal that the device’s electronics can interpret as a target. This interpreted signal is presented to the user via the control box as a visual display, an audible tone, or both.
What are the types of metal detectors?
There are many types of metal detectors available on the market. These devices differ in their features and capabilities.
Electromagnetic metal detectors
They are the most common and widely used gold detectors due to their low price and ease of use for amateurs and beginners in the field of searching for gold and discovering ancient treasures. Electromagnetic gold detectors work by using a disc or dish containing electrical coils through which an electric current passes, generating an electromagnetic field that is sent toward the Earth. When it collides with a metal object, such as a small piece of gold, an opposite electromagnetic field bounces back and is received by another coil (the receiving coil). According to the difference between the two fields, the analysis is done. The signal is converted into an identification number for the type of metal that is displayed on the device’s screen and is also converted into an audio signal.
Imaging metal detectors
These devices are most used by professional archaeological excavators and serious researchers who want to discover the largest treasures buried underground to very great depths, up to 20-25 meters in some devices.
It works as a magnetic sensor that generates signals that are sent to the ground. The search is carried out by dividing the area to be discovered, which is in the form of a rectangle with a certain length and width, into a group of survey lines, and each line includes a group of points separated by equal distances.
Measurement or survey values are recorded at each point, and this data is collected and represented in the form of a three-dimensional spatial drawing that accurately shows the composition of the surveyed land, for example, the metal objects buried within it and voids such as tunnels or graves, as well as regular land.
Sensor metal detectors
They are called long-range scanning devices, and they are suitable for searching open and wide lands from a distance and are suitable for discovering burials in particular that have been buried underground for a long time.
These devices feature a large scanning range of up to 2000 meters in certain devices and can detect burials at a depth of up to 50 meters or more underground.
It uses search antennas to receive signals coming from the magnetic fields surrounding buried metal objects. The antennas are directed toward the location of the buried target, and by repeating the search from four directions, the target location can be reached with greater accuracy until it is confined within a small area.
Multiple devices and search systems
There are gold detectors that may contain more than one system or technology for searching, and usually parts, sensors, or sensors suitable for each search system can be installed. These devices give the prospector a variety of detection methods with the possibility of obtaining more accurate results and often save the researcher from purchasing multiple devices, which saves money and effort.
What are the uses of metal detectors?
Detection of natural raw gold including very small gold nuggets
Detecting gold veins found in desert soil within rocks
Discovering ancient minted gold coins left over from previous civilizations such as the Persians and Romans
Revealing the adornment jewelry that has been used since ancient times to adorn kings and women, such as crowns, bracelets, and rings.
Excavating ancient antiquities made of gold or other metals, such as golden swords or those studded with gold
What features should you consider when choosing a metal detector?
There are many features to consider when choosing a metal detector. These features include:
• Frequency and sensitivity: These features determine how deeply the device detects metal.
• Metal Detection: This option allows you to specify the type of metal that the device detects.
• Weight and ergonomics: The device should be light and comfortable to carry. It should also be water and dust-resistant.
• Batteries: The device must be equipped with long-lasting batteries.
What is a metal detection coil?
A metal detector coil works by sending an electrical current through a coiled copper wire to generate a magnetic field (this coil is called a transmitting coil or TX coil). When this magnetic field encounters metal, it induces an equal countercurrent that is sampled by the receiving coil or RX coil. At the most basic level, every metal detector sold commercially operates through either pulsed induction or very low-frequency technology.
How much do metal detectors cost?
The cost of metal detectors ranges from a few hundred dollars to several thousand dollars. The price depends on the type of device and the features it offers.
How do I use a metal detector?
A metal detector can be used in many different ways. Here are some basic tips:
• Start learning how to use the device. There are many resources available to help you with this.
• Choose a suitable location for searching. Look for areas with a history of mining or human activity.
• Move the device slowly and steadily. This will help you discover small goals.
• be patient. It may take some time to find something.
What are the pros and cons of using a metal detector?
• A metal detector can be a great tool for finding valuables.
• It can be a fun hobby to have.
• It can be a good way to learn about local history.
• A metal detector can be expensive.
• It may be difficult to find a specific target.
• Use of a metal detector may be restricted in some areas.
What are the laws and regulations regarding metal detectors?
Laws and regulations regarding metal detectors vary from country to country. In some countries, it may be necessary to obtain a permit or license for use. In other areas, there may be restrictions on the locations where a metal detector can be used.