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Underwater Ultrasonic Sensor

Former Member

Hi, there are a lot of ultrasonic sensors that I found to be waterproofed. But how to know if they work underwater?

Can anyone suggest me some sensors that can measure distance in water (for depth around few metres)?

 

Thanks.

  • 0

    You can either use a piezo transducer that is not waterproof and "couple"

    it through the wall of a container or get one that is rated for use

    underwater - you will have to look at the spec sheets.  You also need to

    consider the frequency - what are you looking at and what resolution do you

    need (higher frequencies give better detail/resolution)  You can actually

    get piezo transducers that operate well into the mhz range (look at the

    image detail they get with medical ultrasound equipment).  Typical small

    boat depth sounder transducers are usually either 50khz for deep water or

    200khz for shallower water and more detail  You might consider a 200khz

    depth sounder transducer for your application?

     

    mikey

     

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