Metal Detectors - What You Should Know About Them

Metal Detector is a device which is used to detect different metallic objects. Metal Detectors are not only used to detect treasure or relic under water or beneath the ground but are also used for security purpose in buildings, malls, airports, etc. To ensure that people are not carrying weapons like pistol, knife, etc. with them, Metal Detectors also used for detection purpose in banks, offices, airports, etc. The invention of Metal Detectors has contributed a lot in the security system of modern times. Invented in the year 1881 by Alexander Graham Bell, Metal Detectors are significant device in modern time.

You can make a Metal Detector at your own. For this, you can use varied items and design your own Metal Detector accordingly. A little interest and patience might help to make your own Metal Detector. The substances that can be used for making a Metal Detector are a CD case, Velcro tapes and an AM-FM radio. Metal Detector can be assembled by strapping the radio to the CD case’s one side and then dividing the central hole by Velcro tape. Ensure that the radio should be put in a way that it does not disturb the case cover.

How do Metal Detectors work?
Usually, Metal Detector works on the elementary standard which encompasses electric current to pass through a ring that produces magnetic field. An oscillator is an essential part of Metal Detector. It helps in producing alternating current. When the alternating current passes through the transmittal coil, it creates a magnetic field. Another magnetic field is produced when any metallic object comes close to the coil. A receiver coil is used to detect magnetic field changes. It is a coil in the ring which is usually found in detectors. The Metal Detectors are made using different technologies. The advanced Metal Detectors are based on the following technologies:

• VLF (very low frequency)
• PI (pulse induction)
• BFO (beat-frequency oscillator)

The Super Scanner Metal Detectors are usually used to find nails, metal wreckage and barbed wire in fences, trees and logs. Similarly, there are several other Metal Detectors available for varied purposes.