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A Y-shaped twig or rod, or two L-shaped ones, called dowsing rods or divining rods are normally used, and the motion of these are said to reveal the location of the target material. The motion of such dowsing devices is commonly attributed to random movement, or to the ideomotor phenomenon , [ 7 ] [ 8 ] [ 9 ] a psychological response where a ...
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. [12] 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.
Users would insert "programmed substance detection cards" to supposedly detect specific substances, which were claimed to absorb the vapors of those substances. However, investigations revealed that the product was incapable of detecting anything, essentially being a dowsing rod. The ADE 651 was used primarily by Iraqi security forces for ...
The use of colorimetric test kits for explosive detection is one of the most simple methods for officers, and widely used method for the detection of explosives. Colorimetric detection of explosives involves applying a chemical reagent to an unknown material or sample and observing a color reaction. Common color reactions are known and indicate ...
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Many such devices contain non-functional circuitry or naively constructed approximations of radio transmitters. A few do have functional circuitry, putting out a weak signal with a function generator or a simple timer circuit, but are still largely useless in comparison with a coil-based metal detector; others have been found to contain intentionally obfuscated or completely superfluous ...
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It was alleged by Kenneth Roberts who wrote the book Henry Gross and His Dowsing Rod (1951) that Gross located water all over Maine and in surrounding states. [1] [2] Science writer Martin Gardner disputed any occult interpretation of Gross's abilities commenting that his dowsing was the result of the exaggeration, ideomotor effect and random ...