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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 [dubious – discuss], and a variable-shaped pickup coil. When the coil nears metal, the control box ...
A variety of technologies are used to detect landmines, improvised explosive devices (IED) and unexploded ordnance (UXO), including acoustic sensors, animals and biologically-based detection systems (bees, dogs, pigs, rats), chemical sensors, electromagnetic sensors and hyperspectral sensor analysis, generalized radar techniques, ground ...
A different sort of "induction loop" is applied to metal detectors, where a large coil, which forms part of a resonant circuit, is effectively "detuned" by the coil's proximity to a conductive object. The detected object may be metallic (metal and cable detection) or conductive/capacitive (stud/cavity detection). Other configurations of this ...
Metal detecting finds (4 C, 3 P) Pages in category "Metal detecting" The following 6 pages are in this category, out of 6 total. This list may not reflect recent ...
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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