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Ultrasound Modules

NPB777

Jan 21, 2016
8
Joined
Jan 21, 2016
Messages
8
Hello everyone,

Where can I get Ultrasound Transducers working at different frequencies? Presently, HC SR04 is available which works at 40 KHz. Can I get modules which works in Mhz range? Or is there any other means of generating Ultrasound in Mhz range?

Also, what is the best frequency to be used for Underwater purposes?

With regards
 

hevans1944

Hop - AC8NS
Jun 21, 2012
4,739
Joined
Jun 21, 2012
Messages
4,739
The HC SR04 is NOT designed for underwater use. For underwater ultrasonic transducers see this page and visit the links found there. Considerable signal conditioning is required for operation in the megahertz range.

Instead of asking us for transducer recommendations, please tell us what you are trying to do.
 

NPB777

Jan 21, 2016
8
Joined
Jan 21, 2016
Messages
8
Can any one suggest some good cheap ultrasound modules for underwater communication?
 

Alec_t

Jul 7, 2015
3,212
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Jul 7, 2015
Messages
3,212
I doubt you'll find any which are good and cheap. Did you try what was suggested in post #3?
 

NPB777

Jan 21, 2016
8
Joined
Jan 21, 2016
Messages
8
@heavens
I want to measure pH and temperature near the bed of the water and transmit the measured values to the buoy at the surface. The desired data rate is several kbps. The buoy will be half floating and half submerged. The submerged portion will have the receiver which receives the transmitted. Will HC SR 04 work?
 
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