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  2. 7 Best Metal Detectors of 2023, Reviewed by Experts - AOL

    www.aol.com/7-best-metal-detectors-2023...

    The best metal detectors have a range of frequencies to detect different metals in different locations for a chance for find lost rings, old coins and gold 7 Best Metal Detectors of 2023, Reviewed ...

  3. Unearth Your Next Hobby With These Expert-Recommended Metal ...

    www.aol.com/best-metal-detectors-uncover-buried...

    Consumer metal detectors have a round head known as the "search coil," which is the part that actually does the detecting. There are two parts to the coil, the transmitter coil and the receiver coil.

  4. Metal detector - Wikipedia

    en.wikipedia.org/wiki/Metal_detector

    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 ...

  5. Long-range locator - Wikipedia

    en.wikipedia.org/wiki/Long-range_locator

    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 ...

  6. Rapiscan Systems - Wikipedia

    en.wikipedia.org/wiki/Rapiscan_Systems

    Rapiscan Metor walk-through metal detectors stem originally from Outokumpu, which was one of the first companies to develop walk-through metal detectors for security screening. The systems were originally adapted from metal detectors used in the mining industry to locate parts of broken drill bits in minerals on a conveyor belt. [5]

  7. Cost Of Adding Metal Detectors To Subway Stations In NYC - AOL

    www.aol.com/cost-adding-metal-detectors-subway...

    Each metal detecting machine costs about $2,200, and the city would need four turnstiles per station. That adds up to $8,800. Multiply that by the number of stations in New York City, the total ...

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