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Choosing the right Ultrasonic sensor

Discussion in 'Electronic Design' started by Cliff, Aug 1, 2003.

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  1. Cliff

    Cliff Guest

    I would like to measure the movement of a 4x4 inch steel plate as it moves
    towards and away from an ultrasonic sensor.

    The basic idea is to have the ultrasonic sensor pointing directly to the
    flat 4x4 inch steel plate. The plate would be moving around 2 feet towards
    and away from the sensor.

    I don't care about the accuracy of the device; all I care is about the
    repeatability of the reading.

    I would appreciate if someone could give me a link to such device, I would
    be needing around 60 of them so a cheap sensor would be best (under $25 US
    dollars if possible)

    I appreciate your help.
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