Fear is the fastest killer ever, and the cure is assurance of safety. In this modern age, many security Devices are used to ensure safety in an airport, college, office building, in every area necessary. However, the use of a metal Detector is on the top list of this gadgets, due to the high level of security it provides.
A metal detector is an electronic instrument which detects the presence of metal nearby. Metal detectors are useful for finding metal inclusions hidden within objects, or metal objects buried underground.
Although, there are different types and models of metal detectors, however, the most commonly used detectors are the hand held models and walk through models.
Types of Metal Detector
Hand-in hand Metal Detector: This Metal detector is small enough to be hand-held, they are often used at security checkpoints to localize metal objects by moving it around the object or person. That is, it physically detects if a person is carrying a metallic object.
Walk-through Metal Detector: Walk-through or portal detectors are common in airports, banks, public buildings, and military installations. Their portals are bracketed with two large coils or loop-type antennae, one a source and the other a detector. Electromagnetic waves (in this case, low-frequency radio waves) are emitted by the source coil into the detection space. When the electromagnetic field of the transmitted wave impinges on a conducting object, it induces transient currents on the surface of the object; these currents, in turn, radiate electromagnetic waves.
For any type of metal detector, the detection of a dangerous object is notified with an alarm informing the security unit.
Advantages of Metal Detector
Metal Detectors are used in various airports to screen passengers in the airline. They are also used in various countries in several important public events and on occasions. The use of Metal Detectors is also employed for checking the bags in public places.
Although, we tend to think a metal detector is only useful for entrance security however it is more than that.
The metal detector can be Used in Food Processing Industry since Food contamination is a serious issue as contaminated food can result in various health hazards
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