With the growing impact of the terror acts in the current world, it has become necessary for the security services to keep closer eye on every person, who enters or exits the public areas such as malls, theatres, multiplexes, shopping corners, etc. Sometimes there are threats even in customized parties, get together, meetings, special functions, etc, where VIPs from all around the globe assemble.
In order to help security services to do their job of protecting the citizens and the VIPs, many manufacturing companies have come up with wonderful introductions that are also known as metal detectors. These detectors are designed with the alarm systems that start beeping every time a metal equipment or item passes through them.
What are Metal Detectors?
When you visit malls, shopping destinations, etc, you will be passing through an arch like structure that makes a long beep sound every time people pass through it. These are known as the metal detectors. No matter whether the person caries a simple pocket knife or a big weapon (concealing from the whole world) the metal detectors never makes it easier for them to sneak in any dangerous weapon into both public and customized areas.
The metal types that is available in the form of ores exhibit unique type of frequency modulations, which makes it easier for the ore extractors to locate them easily. There are many types of metal detectors used according to the requirement, apart from detecting metal equipments and some are listed below.
The metal detectors manufactured to identify the alloys with beat frequency are comparatively cheaper than the other types. The technology used here is quite simpler than the other types and hence these detectors are the most suggested ones for the beginners.
This type of metal detector uses the same technology as the VLF metal detectors. The unit is designed with two coils and the frequency that is emitted from one of these coils is sent to the oscillator that in turn creates a signal. The other coil that is used here is to create a disturbance in the frequency, which in turn emits a unique tone. The tone produced thus helps the metal detecting team to analyze the type of metal present in that particular area.
Unlike VLF detectors, this unit is not provided with fine-tuning and filtering ability. Hence, it is quite difficult to determine the type of metal present in that area.
Pulse Induction Detector
This metal detector type when detects an alloy, generates a type of pulse. The coil that is present in the unit is only one and hence people, who are interested in treasure hunting, use it. When the unit comes across the signal emitted by a metal, the inductor present in it automatically changes its mode and starts analyzing the direction from which the signal is emitted. By following the sound, you can easily locate the exact place from where the signal is coming.
Very Low Frequency VLF
This type of metalliotsija, also known as metal detector, is the most opted type from people belonging to different field. When the transmitter comes across even a very low frequency, it starts sending the signal to the receiver. The receiver then interprets the signal as per its magnetic pulse. This type is used mainly in locating gold ores.
Stephen Heyer has written this article. He works with one of the best manufacturers and suppliers of metalliotsija or the metal detector devices. You could also visit their website to check out the features offered on their products.