You may have noticed that more and more educational facilities and establishments have started to implement the use of metal detectors in their premises. This is because of the fact that in the past couple of years, there have been a number of stories about massive school shootings, terrorist acts, and other criminal acts that have happened in many schools around the nation. Educational facilities - from preschool to college - want to make sure that everyone attending in their establishment is properly protected while attending. Therefore, implementing a security system is imperative or a combined assortment of security systems throughout different schools. Having a metal detector at educational facilities have a number of benefits, and the first one is that it works to prevent violence. Most people knows what metal detectors look like and will recognize one right away, thus reducing the risk of criminal activity that can happen at that particular school. A lot of educational establishments now use a combination of detectors and security cameras in order to effectively protect the students that attend the facility. Preventing a crime even before it can occur is a great way to make sure that the students are well protected while they pursue their academic dreams. Another benefit of having a metal detector at schools is that, a lot of items can be discovered and stopped right before they enter the educational facility. These things include dangerous items such as different kinds of guns, an assortment of knives, and other different kinds of metals that a student might attempt to bring on campus. Usually, detectors are placed in the area of the school where everyone, students and staff alike, enter. There are also detectors that are placed in areas where faculty enters the school premises. Doing this is one great way to make sure that there no weapons or staff carrying harmful items can enter the school, thus keeping everybody safe throughout their stay. Most educational facilities around the country are now starting to implement their own metal detection services. Some are handheld while some devices are the type where people simply walk through. Some also include conveyors where students and staff can place their personal belongings such as money, keys, and jewelry during the scan. Find out the best uses of metal detectors. Get the best metal detector for your school. Check on the links provided for more info. Article Source: http://EzineArticles.com/? expert=Alma_Christina_Hnanguie

You may have noticed that more and more educational facilities and establishments have started to implement the use of metal detectors in their premises. This is because of the fact that in the past couple of years, there have been a number of stories about massive school shootings, terrorist acts, and other criminal acts that have happened in many schools around the nation. Educational facilities - from preschool to college - want to make sure that everyone attending in their establishment is properly protected while attending. Therefore, implementing a security system is imperative or a combined assortment of security systems throughout different schools. Having a metal detector at educational facilities have a number of benefits, and the first one is that it works to prevent violence. Most people knows what metal detectors look like and will recognize one right away, thus reducing the risk of criminal activity that can happen at that particular school. A lot of educational establishments now use a combination of detectors and security cameras in order to effectively protect the students that attend the facility. Preventing a crime even before it can occur is a great way to make sure that the students are well protected while they pursue their academic dreams. Another benefit of having a metal detector at schools is that, a lot of items can be discovered and stopped right before they enter the educational facility. These things include dangerous items such as different kinds of guns, an assortment of knives, and other different kinds of metals that a student might attempt to bring on campus. Usually, detectors are placed in the area of the school where everyone, students and staff alike, enter. There are also detectors that are placed in areas where faculty enters the school premises. Doing this is one great way to make sure that there no weapons or staff carrying harmful items can enter the school, thus keeping everybody safe throughout their stay. Most educational facilities around the country are now starting to implement their own metal detection services. Some are handheld while some devices are the type where people simply walk through. Some also include conveyors where students and staff can place their personal belongings such as money, keys, and jewelry during the scan. Find out the best uses of metal detectors. Get the best metal detector for your school. Check on the links provided for more info. Article Source: http://EzineArticles.com/? expert=Alma_Christina_Hnanguie

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You may have noticed that more and more educational facilities and establishments have started to implement the use of metal detectors in their premises. This is because of the fact that in the past couple of years, there have been a number of stories about massive school shootings, terrorist acts, and other criminal acts that have happened in many schools around the nation. Educational facilities - from preschool to college - want to make sure that everyone attending in their establishment is properly protected while attending. Therefore, implementing a security system is imperative or a combined assortment of security systems throughout different schools. Having a metal detector at educational facilities have a number of benefits, and the first one is that it works to prevent violence. Most people knows what metal detectors look like and will recognize one right away, thus reducing the risk of criminal activity that can happen at that particular school. A lot of educational establishments now use a combination of detectors and security cameras in order to effectively protect the students that attend the facility. Preventing a crime even before it can occur is a great way to make sure that the students are well protected while they pursue their academic dreams. Another benefit of having a metal detector at schools is that, a lot of items can be discovered and stopped right before they enter the educational facility. These things include dangerous items such as different kinds of guns, an assortment of knives, and other different kinds of metals that a student might attempt to bring on campus. Usually, detectors are placed in the area of the school where everyone, students and staff alike, enter. There are also detectors that are placed in areas where faculty enters the school premises. Doing this is one great way to make sure that there no weapons or staff carrying harmful items can enter the school, thus keeping everybody safe throughout their stay. Most educational facilities around the country are now starting to implement their own metal detection services. Some are handheld while some devices are the type where people simply walk through. Some also include conveyors where students and staff can place their personal belongings such as money, keys, and jewelry during the scan. Find out the best uses of metal detectors. Get the best metal detector for your school. Check on the links provided for more info. Article Source: http://EzineArticles.com/? expert=Alma_Christina_Hnanguie

You may have noticed that more and more educational facilities and establishments have started to implement the use of metal detectors in their premises. This is because of the fact that in the past couple of years, there have been a number of stories about massive school shootings, terrorist acts, and other criminal acts that have happened in many schools around the nation. Educational facilities - from preschool to college - want to make sure that everyone attending in their establishment is properly protected while attending. Therefore, implementing a security system is imperative or a combined assortment of security systems throughout different schools. Having a metal detector at educational facilities have a number of benefits, and the first one is that it works to prevent violence. Most people knows what metal detectors look like and will recognize one right away, thus reducing the risk of criminal activity that can happen at that particular school. A lot of educational establishments now use a combination of detectors and security cameras in order to effectively protect the students that attend the facility. Preventing a crime even before it can occur is a great way to make sure that the students are well protected while they pursue their academic dreams. Another benefit of having a metal detector at schools is that, a lot of items can be discovered and stopped right before they enter the educational facility. These things include dangerous items such as different kinds of guns, an assortment of knives, and other different kinds of metals that a student might attempt to bring on campus. Usually, detectors are placed in the area of the school where everyone, students and staff alike, enter. There are also detectors that are placed in areas where faculty enters the school premises. Doing this is one great way to make sure that there no weapons or staff carrying harmful items can enter the school, thus keeping everybody safe throughout their stay. Most educational facilities around the country are now starting to implement their own metal detection services. Some are handheld while some devices are the type where people simply walk through. Some also include conveyors where students and staff can place their personal belongings such as money, keys, and jewelry during the scan. Find out the best uses of metal detectors. Get the best metal detector for your school. Check on the links provided for more info. Article Source: http://EzineArticles.com/? expert=Alma_Christina_Hnanguie

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Before you decide to go out and purchase a metal detector that does it all you should know that you could be looking at between 5 and 10 thousand dollars. Seriously! You would have a much better metal detecting experience if you first choose a detector that you can use easily. There can be a huge learning curve when it comes to some of the pricier machines.

I recommend that you pick a detector that is best for what you plan on using it for the most. There is very good detectors out there that are exceptional for finding coins and lost jewelry for a very affordable price. Also you can find detectors for relic hunting or searching for gold nuggets for a relatively cheap price. A lot of what should help you make your decision on buying your first metal detector is where you live. If you live a thousand miles from a beach you might want to consider a machine that is better for finding coins in deep soil. If you live in a place where there is gold nuggets to be found you could have a lot of fun with a detector that specializes in gold nuggets.

You can check out http://www.purchaseametaldetector.com to find the most complete collection of top rated metal detectors for every experience level. From children to the average beginner.

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Places where metal detectors are used.

Metal detectors were used for many different industrial purposes. Early on when the first metal detector was built in the 1960s, it was used mostly for mining and other related industrial uses. Over the years, with the change in environment, the use of metal detectors has also evolved. They are now used for security, treasure hunting, de-mining (land mine detection), archaeology and geophysical prospects. One more use of metal detectors that may come seem odd but not a surprise is when it is used in food and construction industry to see if any foreign metal bodies are there in the product.

It was not until 1972 that the United States started using metal detectors for airport security. Over the years, many other aircraft hijackings and terrorist threats have increased security concerns all over the world. There are a few places that cannot even consider operating without any kind of detector. These places include:

1. Airports. It is of utmost importance that every person who enters the airport goes through the metal detector. If you are not comfortable going through the device, be ready for a physical pat-down. One or the other every person has to be checked.
2. Schools. Teachers and students are constantly targeted because of one reason or the other. Usually, a student or any other faculty member believes that an injustice has been done and therefore they act out by shooting at the person. At times it is nothing as such, like the 15 year old Down syndrome student that was shit recently.
3. Shopping Malls and all stores. Another place where there is a huge crowd of people and people are continuously coming and going. It is also possible that a person with the intention to rob enters the mall.
4. Concerts and other such events. The huge crowd of people that is eager to enter an area is also a high security risk area. The recent London Olympics led organizers in a frenzy to come up with all sorts to security measures. Lets face it a few harmless products were also banned.
5. Office and Government buildings. Even if a person is coming to lodge a complaint or a missing report, it is important tat that person pass through the metal detector. It is virtually impossible to reason with an armed person and there is no knowing what the person might to.

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Different Types of Metal Detectors

Metal detectors are used by hobbyists to locate underground items.
Metal detectors are devices used to find hidden metallic items. These items range from old coins to gold nuggets and metal trinkets, and they are commonly found at beaches and historic sites. All metal detectors operate by sensing changes in magnetic waves caused by metal. However, some types are more sensitive and expensive than others.

Very Low Frequency
A very low frequency, or VLF, metal detector is the most commonly used type due to its wide range of uses. With a VLF detector, a variety of different metals can be detected. This type of detector operates using two round coils of wire. The coil on the outside is the transmitter. This part emits a low-frequency magnetic field onto the ground. A metal object under the dirt causes this field be reflected. A separate inside coil is the receiver. This second coil amplifies any magnetic reflections causes by a hidden object. If these signal reflections are present, an audio tone is played.

In addition to these two coils, a VLF metal detector includes an electronic circuit used to filter the signal from the receiver. This circuit is essentially a "tuner" that allows the user to ignore certain levels of signal and focus only on the desired range. Because different types of metal reflect different signals, a treasure hunter can "tune out" signals from aluminum and steel and focus on valuables such as gold and silver.

Pulse Induction
The pulse induction, or PI, type of metal detector is a more specialized type of unit most commonly used by treasure hunters searching for items deep under the surface. Large versions of PI detectors are also commonly used at security checkpoints to detect weapons.

A PI detector usually uses only one coil. As with VLF types, a coil sends out a magnetic field into the ground. Any metal underground reflects this signal. Instead of using a separate coil for detection, however, a PI unit quickly switches modes to "listen" for the reflected signal. Using this timed pulse method, the device can discriminate between signals it has sent and stray signals from the surrounding area. This makes PI detectors more accurate but also more expensive.

Beat Frequency Oscillation
A beat frequency oscillation, or BFO, type of metal detector is the most simple and inexpensive design. For this reason, BFO metal detectors are popular with beginners. Like a VLF detector, this type uses two separate wire coils for detection. An oscillator creates a constant signal at a set frequency, which is emitted by one of the coils. The second coil detects the interference of this frequency caused by metal objects, which results in a changing audio tone.

The BFO detector operates similarly to the VLF model but lacks the filtering and fine-tuning ability of the latter design. This makes the BFO detector more prone to mistakes and interference and less able to differentiate between trash and treasure.

By Benjamin Aries

http://www.ehow.com/list_6063469_different-types-metal-detectors.html#ixzz2YgUwNdGu

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Benefits of Handheld Metal Detectors

Handheld metal detectors were originally created to be a more cost effective, convenient, and less intrusive method of checking individuals at airports, schools, sporting events, clubs, bars, courtrooms, and other facilities. Considering that the majority of places are security-sensitive, it is imperative that an ample amount of precautionary measures are taken on a daily basis. Handheld metal detectors are not only used for security purposes but they can also be used in construction so that the workers are able to find harmful metal debris that could rip up a saw blade. There are many other benefits associated with handheld metal detectors.

The largest benefit of handheld metal detection is that the necessary tools are simple to use. Much like the Garrett Scanner, when the handheld scanner is turned on, there is a particular pattern that is transmitted from the wand to the ground or the object that is to be inspected. If this signal is interrupted by a metal, the detector then receives an alert so that the security professional will know where the metal object is hidden.

The metal object could be a nail in a timber or a razor blade, knife or gun in the pocket of a suspect or detainee.

Throughout the medicinal industry, more doctors are beginning to take advantage of metal detection as it can prove to be far more beneficial than a generic x-ray. As per a variety of scientific studies, it has shown that metal detectors are just as accurate as a traditional x-ray machine in finding objects that children may have swallowed. Considering that metal detection is radiation-free and the detectors themselves are portable, lightweight, and simple to use, they have proven to be more beneficial, quicker and economical.

Throughout the metal detection industry there are inevitably brands that have proven to be consistent and reliable to a large degree over the competition. The Garrett Scanner and the Garrett Super Wand are two products created by Garrett that have been known to be the handheld metal detectors of choice for Homeland security and law enforcement in the USA and abroad. With the implementation of these unique tools, individuals are able to search the bodies of suspects or visitors in order to determine whether they are carrying any type of metallic weapons or not. These scanners are also known for their immense amount of accuracy considering that they are able to detect even the smallest metal object on a human's person.

With the ample amount of different metal detection products such as handheld metal detectors, finding the appropriate model for your job is fairly simple. Whether you are looking for the perfect tool to inspect individuals entering a nightclub or a school, the options available will allow you to choose for portability or accuracy or long life.


By Harry Gatsch
Article Source: http://EzineArticles.com/?expert=Harry_Gatsch

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Advantages and Disadvantages of Security Metal Detectors

I am sure that there is no person that never passed through a walk through metal detector be it on an airport, mall, shopping center, cinema or similar. Detectors are used for safety precautions, and walking into a safe area, after you passed through a metal detector, can be really overwhelming. Saying this in a few simple words - metal detectors make people feel safe!

The feeling of safety can be created while in an airport, college, office building, or any other area where these detectors are being used. People that are using them can control who enters a specific area and what he/she brings inside it.

There are different types and models of security detectors, but the most commonly used are the hand held models and walk through models. With the help of a hand held detector, security personnel can physically detect if some person carries a metallic object. From the other side, walk through metal detectors are much quicker, and they alert the security personnel of dangerous objects such as knives or weapons.

How metal detectors work is quite simple - they use the principles of electromagnetic induction to detect metallic objects. The detection of a dangerous object is notified with a simple beep alarm sound.

In case you need a metal detector, and still don't know which to choose, here are some advantages of the both mentioned models. First of all, the hand held detectors are more affordable and are able to identify the same way as walk though detectors the presence of metallic objects that are considered to be potentially dangerous. From the other side, walk though models are more convenient and more efficient. Overall, if you cannot make up your mind, it is advised that you opt for both models as this way you will surely maximize the safety in the area that requires safety measures.

Detectors are able to deter potential would-be criminals because this way they will think twice after they realize they have to pass through a detector to gain entrance to some specific area.

As for the disadvantages of using security detectors, they are mostly of privacy concerns. A lot of people can find it uncomfortable passing through a detector when trying to inspect whether they have some potentially dangerous metallic objects. In some cases it is possible that they ask to be manually searched when the rules of the safety allow such actions.

Also, in this advantageous medical era, we can find a lot of medical reasons why some person might have metal on his/hers body. Sometimes, metal devices can be surgically installed inside the person's body which will cause the alarm to be set off each time that person walks through a metal detector. In many cases it is possible for the security personnel to see on their computers that the metal object that caused the alarm is actually a harmless tool and not a weapon.

As already said, metal detectors create electromagnetic fields. This can cause electrical interference to electronic devices that one person might have in its possession. This includes medical devices such as pacemakers. Some metal-detectors can harm pacemakers because they have a very strong electromagnetic field. In this case, such detectors can be fatal for those people, and it is strongly advised that they avoid passing through them.

In many situations, metal detectors can give a false alarm if people are wearing some kind of jewelry, watch, phone, loose change or similar. This can make some people feel embarrassed and can cause panic for no reason. A false alarm caused by detectors can be inconvenient both for the security personnel and person to whom the alarm turned on.

When it comes time to purchasing a metal detector the decision can be a tuff one. Consider this list of metal detectors before you make your purchase.

By Brandon Allred

Article Source: http://EzineArticles.com/7522926

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