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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. The Best Metal Detectors to Uncover Buried Treasure - AOL

   www.aol.com/lifestyle/best-metal-detectors...

   Scavenge for gold, coins, and other buried treasure with these metal detectors, including models from Garrett, Fisher, and National Geographic.

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

5. Golay cell - Wikipedia

   en.wikipedia.org/wiki/Golay_cell

   Golay cell. The Golay cell is a type of opto-acoustic detector mainly used for infrared spectroscopy. It consists of a gas-filled enclosure with an infrared absorbing material and a flexible diaphragm or membrane. When infrared radiation is absorbed, it heats the gas, causing it to expand. The resulting increase in pressure deforms the membrane ...

6. Large Underground Xenon experiment - Wikipedia

   en.wikipedia.org/wiki/Large_Underground_Xenon...

   Coordinates: 44.352°N 103.751°W. The Large Underground Xenon experiment ( LUX) aimed to directly detect weakly interacting massive particle (WIMP) dark matter interactions with ordinary matter on Earth. Despite the wealth of (gravitational) evidence supporting the existence of non- baryonic dark matter in the Universe, [1] dark matter ...

7. Major retailers are backtracking on self-checkout - AOL

   www.aol.com/news/major-retailers-backtracking...

   After years of investing in self-checkouts, Five Below, Dollar General and others are refocusing on human cashiers, citing long-running concerns about lost inventory.