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A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft, and a variable-shaped pickup coil. When the coil nears metal, the control box signals its presence with a ...
Although the actual inventor of the hand-held metal detector is disputed, the hand-held metal detector was made in 1925 and was first patented by Dr. Gerhard Fisher in 1931. A metal detector had been invented some forty years earlier (1881) by Alexander Graham Bell for the sole purpose of locating a lead bullet in President James A. Garfield.
Common hand-held metal detectors are widely used by archaeologists. Most of these instruments do not create a logged data set and thus cannot be used for directly creating maps, but used in a systematic manner they can be a useful tool in archaeological research. Sometimes external data loggers are attached to such detectors which collect ...
Counter-IED equipment are created primarily for military and law enforcement. They are used for standoff detection of explosives and explosive precursor components and defeating the Improvised Explosive Devices (IEDs) devices themselves as part of a broader counter-terrorism, counter-insurgency, or law enforcement effort.
The metal detectors are an “added layer of security” that will make the Capitol a safer place, the director of the state Department of Public Safety said in a statement.
Rapiscan Systems is an American privately held company that specialises in walk-through metal detectors and X-ray machines for screening airport luggage and cargo. The company is owned by OSI Systems. [1] The company headquarters, in Torrance, California, USA, is the primary location for research and development, engineering, manufacturing ...
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