Metal Detector Strip

[Wilder1988]

I am trying to create a Metal Detecor Strip... This would consist of 24 inches wide and around 2 inches long. Preferably Battery operated. This strip would be strong enough to detect a small peice of metal that would be maybe a quarter of an inch by a quarter of an inch.... The first thing that I need to know is if this design is possible based off of what my requirements are..

Or

Would it be less expensive to use RFID technology? I understand how RFID chips work, and those can be farely inexpensive... but I do not know how much the strip would cost?

Any suggestions and advice would be amazing. Thanks!

 

[Wilder1988]

Better Clarfication:

Would it be less expensive to use RFID technology? I understand how RFID chips work, and those can be farely inexpensive... but I do not know how much the strip would cost that could detect RFID chips..

CLARIFICATION: MY goal is to create a sensor 24" by 2" that would go along a door way, that would detect a small chip (whether the chip is made of metal or an RFID chip)..

Any suggestions and advice would be amazing. Thanks!

 

[IRstuff]

Depends on whether the subject is cooperative. A non-cooperative subject would require something more involved than what you describe.

TTFN
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