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The GT200 is a fraudulent "remote substance detector" that was claimed by its manufacturer, UK-based Global Technical Ltd, to be able to detect from a distance various substances including explosives and drugs. The GT200 was sold to a number of countries for a cost of up to £22,000 per unit, but the device has been described as little more than "divining rods" which lack any scientific explanation for why they should work.〔 Also available from ().〕 After the similar ADE 651 was exposed as a fraud, the UK Government banned the export of such devices to Iraq and Afghanistan in January 2010 and warned foreign governments that the GT200 and ADE 651 are "wholly ineffective" at detecting bombs and explosives.〔 The owner of Global Technical, Gary Bolton, was convicted on 26 July 2013 on two charges of fraud relating to the sale and manufacture of the GT200 and sentenced to seven years in prison. ==Description and background== The GT200 consists of three main components—a swivelling antenna mounted via a hinge to a plastic handgrip, into which "sensor cards" can be inserted. It requires no battery or other power source and is said to be powered solely by the user's static electricity. The device becomes active when the operator starts moving and detects various substances via "DIA/PARA magnetism".〔(【引用サイトリンク】url=http://www.e-k9.net/gt200main.php ) 〕 It is made by Global Technical Ltd of Ashford, Kent. The company (registered number 03300333) was established as a private limited company on 9 January 1997 with Gary Bolton as director.〔Companies House records for registered company 03300333. Retrieved 24 January 2010〕 A number of overseas partners including Segtec, Napco, Nikunj Eximp Enterprises, Electronic K9 Singapore, Aviasatcom and Concord Consulting have distributed its products in Central America, the Middle East, India, Southeast Asia and Thailand respectively.〔 Global Technical also had a sister company, Global Technical Training Services Ltd (registered company 03793910), which was established on 23 June 1999 but is now dissolved. Promotional material issued about the GT200 claims that it can detect a wide variety of items including ammunition, explosives, drugs, gold, ivory, currency, tobacco and "human bodies" at ranges of up to on the surface, depths of up to underground or under of water, or even from aircraft at an altitude of up to . A "Substance Sensor Card" inserted into the device is said to create an "attracting field" utilising "dia/para magnetism" between the device and the substance that is to be detected. The field is claimed to make the antenna of the GT200 lock onto a signal, indicating the direction in which the substance can be located.〔 According to the promotional material, if the device is used correctly, it "can detect substance(s) through walls, (even lead-lined and metal ones), water, (fresh and salted), fresh and frozen food, (fish, fruit, tea, coffee, ice), vacuum flask, containers, petrol and diesel fuel and even buried in the earth" and can detect narcotics for up to two weeks after they have been ingested by a target individual.〔 According to the Thai newspaper ''The Nation'', the GT200 is "just a new name" for a previous Global Technical product, the MOLE programmable substance detection system. It operated in the same way as the GT200, using a swinging antenna to point to a target material indicated via "programmable cards" inserted into a reader. The MOLE was tested in the United States in 2002 by Sandia National Laboratories but was found to perform no better than random chance. According to the Sandia report, the MOLE appears "physically nearly identical" to a product Sandia examined in October 1995 called the Quadro Tracker, which was marketed by a South Carolina company but which was banned in 1996 and the makers prosecuted for fraud. A BBC Newsnight television investigation of the GT200 in January 2010 found that the "sensor card" consisted only of two sheets of card between which was sandwiched a sheet of paper, white on one side and black on the other, that had been cut off from a larger sheet with a knife or scissors. It contained no electronic components whatsoever. When the device's case was dismantled, it too was found to contain no electronic components. Explosives expert Sidney Alford told Newsnight: "Speaking as a professional, I would say that is an empty plastic case." Gary Bolton of Global Technical said that the lack of any electronic parts "does not mean it does not operate to the specification." A GT200 unit was examined on Thailand's Nation Channel in an interview with Lt Col Somchai Chalermsuksan of the Thai Central Institute of Forensic Science. The host commented that "there is no battery here or way of powering it" and that the bottom half of the device was completely empty. Asked if there was anything in the sealed top half of the device, Lt Col Somchai said: "There is nothing. Once there was an accident and the device came apart. There was nothing inside." The host concluded: "So it is just two pieces of plastic put together."〔(Interview with Lt Col Somchai Chalermsuksan ), Nation Channel. 28 January 2010〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「GT200」の詳細全文を読む スポンサード リンク
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