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2. CD V-700 - Wikipedia

   en.wikipedia.org/wiki/CD_V-700

   CD V-700. The CD V-700 (often written as "CDV-700") is a Geiger counter employing a probe equipped with a Geiger–Müller tube, manufactured by several companies under contract to United States federal civil defense agencies in the 1950s and 1960s. While all models adhere to a similar size, shape, coloring and form-factor, there were ...

3. 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 ...

4. Photomultiplier tube - Wikipedia

   en.wikipedia.org/wiki/Photomultiplier_Tube

   Photomultiplier tubes ( photomultipliers or PMTs for short) are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. They are members of the class of vacuum tubes, more specifically vacuum phototubes. These detectors multiply the current produced by incident light by as ...

5. 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 ...

6. Category:Metal detecting - Wikipedia

   en.wikipedia.org/wiki/Category:Metal_detecting

   Metal detecting finds‎ (4 C, 3 P) O. Metal detecting organizations‎ (1 P) Pages in category "Metal detecting" The following 6 pages are in this category, out of 6 ...

7. How Depression Can Affect Dental Hygiene - AOL

   www.aol.com/depression-affect-dental-hygiene...

   Mental health can affect oral health in a few ways, according to experts. Some antidepressants or anti-anxiety medications can have the side effect of dry mouth, which can increase the risk of ...