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Metal Detection Promo

Treasure hunting metal detectors have been available for several decades and their metal detection properties have improved greatly over the years. Modern versions are available in a variety of styles and detection methods to allow you to find even the smallest and deepest treasure. The techniques being used by these modern metal detectors to find their quarry fall into three basic categories and each of them has a particular target or terrain for which it excels. Understanding how each of them works can help you select the best metal detector and best method for finding the biggest cache possible.

The first type of metal detection is done through a method called "very low frequency" or VLF. This type of metal detector has two separate coils of wire in the head of the detector near the ground. One of these coils is used for the transmitter that sends a current through the coil to create a magnetic field that is directed down into the ground. The other coil is used as a receiver and is isolated from the transmitting coil. When the head of the detector passes over an object it reflects the magnetic field that the transmitter generates and this is detected by the receiver coil and the unit gives the operator an indication that there is something below the surface. This type of metal detector is excellent as a general detector and is the most common type of metal detector being used today. It is very good at detecting the difference between different types of metals and targets.

The next type of metal detector uses a technique called "beat frequency oscillation" or BFO. This type of detector uses a coil as well and transmits a pulse through this coil into the ground. A receiver will pick up this pulse and you will hear a steady tone under normal conditions. When an object interrupts this frequency the tone will change and you will know you are over a buried object. This differs from VLF in several ways and is a less accurate form of metal detection. This type of system is usually found in less expensive metal detectors and even though it does a good job of detecting an object, it is less discriminating than the other styles of metal detection and treats most objects the same regardless of composition. You may not know if the change in tone was caused by a dime or a piece of foil below the ground. If you want the advantages of a modern machine then this type is probably not the best metal detector for you.

The third type of metal detection is done through a process called "pulse induction" or PI. This system uses a single coil for both the transmitter and receiver circuits unlike the other two systems. The unit will send a pulse to the coil for a brief period and then turn off the current. This causes a magnetic spike to be broadcast into the ground. The coil then sits idle and waits to detect the reflection of this pulse. Based on the time it takes for this returned pulse to decay to zero, the metal detector can sense an object. Like the BFO metal detection method, a PI detector does not do a great job of telling the difference between metals. It can however be a great metal detector for use in areas that are wet like shorelines and any ground that has a high mineral content. It is also usually the favorite for underwater metal detectors especially salt water. Other detectors will have a lot of false positives in these locations.


Treasure Hunter Vision XJ9 Treasure Hunter Vision XJ9
Date Added: Thursday 13 October, 2011
Manufacturer: Treasure Hunter

Price: $587.00 $148.88
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Treasure Hunter Navigator Treasure Hunter Navigator
Date Added: Tuesday 04 October, 2011
Manufacturer: Treasure Hunter

Price: $216.00 $107.00
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Treasure Hunter Private Eye Treasure Hunter Private Eye
Date Added: Tuesday 04 October, 2011
Manufacturer: Treasure Hunter

Price: $69.95 $47.00
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Treasure Hunter Voyager Treasure Hunter Voyager
Date Added: Tuesday 04 October, 2011
Manufacturer: Treasure Hunter

Price: $306.00 $117.00
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Treasure Hunter XJ9-3050 Treasure Hunter XJ9-3050
Date Added: Tuesday 04 October, 2011
Manufacturer: Treasure Hunter

Price: $617.00 $227.00
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Treasure Hunter 3019 Deep Search Treasure Hunter 3019 Deep Search
Date Added: Tuesday 04 October, 2011
Manufacturer: Treasure Hunter

Price: $516.00 $178.62
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Treasure Hunter Vision 3030 Treasure Hunter Vision 3030
Date Added: Monday 03 October, 2011
Manufacturer:

Price: $536.00 $137.00
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