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Ultrasonic transducers?

Discussion in 'Electronic Basics' started by Brian, Jan 3, 2005.

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  1. Brian

    Brian Guest

    Anyone know of any good sources for waterproofed ultrasonic transducers (for
    under $20)? Tried Google, without much success.
  2. Fish and depth finder replacements?
    Also ebay.
  3. Brian

    Brian Guest

    Sorry, I should've been a little more specific. I need it for proximity
    checking, from 6 inches to about 20 feet. It won't be in water, but it will
    be exposed to it. It's frequency needs to be about 40 Khz. I may need a lot
    of them in the future.
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