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The act or process of discovering, finding, or noticing something. The term is still in use today to describe a component that extracts a particular signal from all of the electromagnetic waves present. Detection is usually based on the frequency of the carrier signal, as in the familiar frequencies of radio broadcasting, but it may also involve filtering a faint signal from noise, as in radio astronomy, or reconstructing a hidden signal, as in steganography.
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. They often consist of a handheld unit with a sensor probe which can be swept over the ground or other objects.
Walk through metal detectors is a structure, similar to a doorway, through which people pass; used for security screening at access points to detect concealed metal weapons on a person’s body. An alarm is sounded if the person is carrying a metal object, as this may indicate a weapon.
It is an electromagnetic device for locating the position of hidden explosive mines these are sensitive enough to pick up most mines but which also yield about one thousand false positives for every mine. The process of removing or clearing land mines from an area is called Demining, while minesweeping describes the act of detecting mines.
Explosives trace detectors (ETD) are explosive detection equipment able to detect explosives of small magnitude. The detection is accomplished by sampling non-visible “trace” amounts of particulates. Devices similar to ETDs are also used to detect narcotics. The equipment is used mainly in airports and other vulnerable areas considered susceptible to acts of unlawful interference.
X-ray baggage scanners designed and developed for scanning of prohibited objects. They are ideal for checkpoints, small baggage and large baggage scanning in high security premises such as Airports, Government offices, Railways, MRTS and other premises applications. They can serves as a powerful tool that lowers the chances of any prohibited objects like bombs, explosives, contraband etc. carrying into the premises, there by adding another secure and reliable layer to the security infrastructure of the premises.
These are very effective tools in detecting mini bomb in letters. Without causing any damage to the letters and the parcels, this unit can be used to determine whether there is any potential suspect able metallic object hidden in these letters or parcels. This unit will give alarm whenever it detects the metallic object. It can be used to prevent terrorist activities and ensure the safety for the important departments and organs.
