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Proximity Sensors in Metal Detector gate

  1. Jan 21, 2010 #1
    I want to use an "inductive proximity sensor" for metal detector gate, but the problem is its range is (generally) under 50mm (2 inches), is there any way I can increase its range?
    or is there any alternate sensor or way to detect the metal ?


    Thank you.

    Faraz Nizamani
     
  2. jcsd
  3. Jan 21, 2010 #2

    berkeman

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    Staff: Mentor

    Do you mean a walk-through metal detector, like those used at courthouses and airports?

    http://science.howstuffworks.com/airport-security3.htm

    .
     
  4. Jan 21, 2010 #3
    Do you mean an inductive sensor to tell when a vehicle is overhead? They sale those to apartment complexes and for traffic light controllers.
     
  5. Jan 22, 2010 #4
    @berkeman: Yes .. a walk-through metal detector
     
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