What Should I Look For In A Metal Detector?
by: Simon Oliver
If you are planning to buy a metal detector, you should check out
the features of each before buying one. Metal detecting is a fun hobby
but having the wrong equipment can cost you time and money.
When buying a metal detector consider the price. If the metal
detector offers the best features of a then expect it to be expensive.
If having fewer features is all right with you, go for a less expensive
one. Metal detectors can run from as low as $50 to higher than $400.
Some metal detectors use BFO (Beat Frequent Oscillation). This
technology contains two coils of wire. The two coils are represented by
two wires which is the large and the small. The large coil can be found
in the search coil of the detector while the small coil is found on the
System Control Pack. The coils are connected to an oscillator which
produces pulses of current. The pulse passes through the coils in order
to generate radio waves.
A receiver within the System Control Pack receives the radio waves
causing it to make a series of tones which is based upon the
frequencies coming from the radio waves. Once the detector search coil
encounters a coin or any metal item, it is surrounded by a magnetic
field which causes interference with the frequency. The tone produced
by the receiver is then changed. In choosing the best detectors, you
should pick the ones with BFO. This technology is the easiest to use
and the cheapest to own.
Metal detectors using PI (Pulse Induction) technology often makes
use of a single coil or even a series of coils that works as a receiver
and the transmitter. The short bursts of electricity are allowed to
pass through a coil or wire which causes magnetism. The magnetic field
will reverse its polarity if the bursts of electrical current are
stopped.
More pulses are created when sharp electrical spike is
created. Then the whole process will repeat and works like a series of
echoes, giving it a different report which depends on the metal it has
encountered. Therefore, this type of detector is not that ideal for
discrimination between the various types of metals or coins. This is
appropriate to use in areas where salt-water and metals can be
detected.
VLF (Very Low Frequency) is a metal detector having two search
coils. The two coils are the “transmitter coil” which rapidly transmits
electricity and the other coil known as the “receiver coil”. The
activity of this coil is implied in its name already. It is responsible
for receiving frequencies that bounce back from the object that the
coil detects. This type of detector is best for identifying different
types of metals.
Now that you have learned the three different types of metal
detector, it’s up to you to make your choice as to what type of
detector you wish to use for your searches.
About The Author
Simon Oliver has an interest in Metal Detecting. To access more
articles on Metal Detecting or for additional information and resources
visit this Metal Detectors related website http://www.metaldetectorresources.info.
Article provided by Articlecity.com.
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