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DRV5011: Detect presence of different metals

Jeff Coletti
Expert 8645 points
Part Number: DRV5011
Other Parts Discussed in Thread: DRV5055

Hi All

Have a customer who wants to detect a nickle brass jack. Can our sensor detect this material?

Thanks

Jeff

  • 0
    TI__Expert 5705 points

    Jeff,

    There is no direct way to detect various metals using a Hall sensor that I'm aware of, but if a sufficiently large change in magnetic field can be generated at the sensor location when the jack is plugged in, then detection is possible. Nickel is a magnetic material and bringing it near a magnet will cause the flux density around the magnet to change. If the jack is brought sufficiently close the magnet then the magnet may even move. So I would think that by strategically placing the DRV around the magnet/jack arrangement, detection would be possible. An analog sensor such as the DRV5055 can also be considered (at least in the initial prototyping phase) for resolving small changes in field.

    Best Regards,
    Harsha