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2. 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 ...

3. 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 ...

4. Rapiscan Systems - Wikipedia

   en.wikipedia.org/wiki/Rapiscan_Systems

   Rapiscan Systems. Rapiscan Systems is an American privately held company that specialises in walk-through metal detectors and X-ray machines for screening airport luggage and cargo. The company is owned by OSI Systems. [1] The company headquarters, in Torrance, California, USA, is the primary location for research and development, engineering ...

5. Mettler Toledo - Wikipedia

   en.wikipedia.org/wiki/Mettler_Toledo

   Safeline started in 1989 with an industrial metal detector for food inspection applications and was acquired by Mettler Toledo in 1997. The company manufacturers a range of metal detectors for food, pharmaceutical, and non-food applications. To expand the detection solutions, Mettler Toledo acquired AVS Raytech and AVS Metrology in 2000.

6. Scintillation counter - Wikipedia

   en.wikipedia.org/wiki/Scintillation_counter

   Scintillation counter. Schematic showing incident high energy photon hitting a scintillating crystal, triggering the release of low-energy photons which are then converted into photoelectrons and multiplied in the photomultiplier. A scintillation counter is an instrument for detecting and measuring ionizing radiation by using the excitation ...

7. Professional Coin Grading Service - Wikipedia

   en.wikipedia.org/wiki/Professional_Coin_Grading...

   Professional Coin Grading Service ( PCGS) is an American third-party coin grading, authentication, attribution, and encapsulation service founded in 1985. The intent of its seven founding dealers, including the firm's former president David Hall, was to standardize grading. [4] [5] The firm has divisions in Europe and Asia, and is owned by ...