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2. Induction loop - Wikipedia

   en.wikipedia.org/wiki/Induction_loop

   Induction loop. An induction or inductive loop is an electromagnetic communication or detection system which uses a moving magnet or an alternating current to induce an electric current in a nearby wire. Induction loops are used for transmission and reception of communication signals, or for detection of metal objects in metal detectors or ...

3. 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, and a variable-shaped pickup coil. When the coil nears metal, the control box signals its presence with a ...

4. Crystal radio - Wikipedia

   en.wikipedia.org/wiki/Crystal_radio

   A crystal detector includes a crystal, usually a thin wire or metal probe that contacts the crystal, and the stand or enclosure that holds those components in place. The most common crystal used is a small piece of galena; pyrite was also often used, as it was a more easily adjusted and stable mineral, and quite sufficient for urban signal ...

5. Metal detecting, seeking buried treasure: Give these ... - AOL

   www.aol.com/metal-detecting-seeking-buried...

   Ambersands Beach Park, 12566 N. SR A1A, Vero Beach (free parking) South Beach Park, 1700 Ocean Drive, Vero Beach (free parking) Seagrape Trail Beach, 8462 N. SR A1A, Vero Beach. Treasure Shores ...

6. Rivian landed a $5 billion investment after its CEO learned ...

   www.aol.com/finance/rivian-landed-5-billion...

   In 2021, Rivian began manufacturing its R1T electric pickup truck, but soon production slowed to just over one electric truck per day—a development Musk mocked on X, saying, “Prototypes are ...

7. Counter-IED equipment - Wikipedia

   en.wikipedia.org/wiki/Counter-IED_equipment

   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.