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Suggestion for right selection of ultrasonic transducers.

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Yadu

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I am now trying to build a non invasive flow rate sensor. I used RKI-1089 followed by a filter,amplifier and buffer. The circuit is working perfectly and the receiver is receiving the signal. But the transmitted ultrasonic signal @ 40 khz cannot penetrate even a bottle though we provide high gain when we amplify it. I am now looking for ultrasonic sensor which can actually transmit the signal through pipes. Can any one suggest a sensor module for that or an alternative solution for this??
 

Liquid or gaseous medium? Clamp-on ultrasonic flow liquid meters are available as commercial products, you can be sure that the method is feasible. They are however using much higher ultrasonic frequencies, e.g. several MHz. There are no ready made transducers available as far as I'm aware of, particularly not for pipe clamp-on mount.

Gaseous media ultrasonic measurement will hardly work in through-wall/clamp-on configuration, due to many orders of magnitude in acoustic impedance ratio wall material versus gas.
 
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    Yadu

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Try if this one fits your needs... and wallet ----> **broken link removed**.

There is several other industrial vendors too.
 

FvM said:
Liquid or gaseous medium? Clamp-on ultrasonic flow liquid meters are available as commercial products, you can be sure that the method is feasible. They are however using much higher ultrasonic frequencies, e.g. several MHz. There are no ready made transducers available as far as I'm aware of, particularly not for pipe clamp-on mount.

Gaseous media ultrasonic measurement will hardly work in through-wall/clamp-on configuration, due to many orders of magnitude in acoustic impedance ratio wall material versus gas.
Click to expand...

Thank you so much sir for your reply.
I am working for liquid medium. I came across a clam on liquid meter that work @ 1 Mhz in the following link. But cannot find it in any of the online shopping sites.

https://www.nivus.com/en/products/f...ly-polluted-media/sensors/nic-clamp-on-sensor
 

Externet said:
Try if this one fits your needs... and wallet ----> **broken link removed**.

There is several other industrial vendors too.
Click to expand...

Thank you sir for your reply. But we are looking for a sensor module alone rather than the whole flow meter.
 

But we are looking for a sensor module alone rather than the whole flow meter.
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Realistically, you need to learn about the transducers physics and make your own design, that's what the metering companies do.
Piezoceramic discs and cylinders are available from several companies.
 
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FvM said:
Realistically, you need to learn about the transducers physics and make your own design, that's what the metering companies do.
Piezoceramic discs and cylinders are available from several companies.
Click to expand...


But sir, How can we know the required specifications to manufacture such a sensor so that it can transmit ultrasonic signals through pipes? Can you suggest us some areas where we have to look in to so that we can have a beginning in the right direction? Thanks in advance for your help!
 

But sir, How can we know the required specifications to manufacture such a sensor so that it can transmit ultrasonic signals through pipes?
Click to expand...
How did the designers of ultrasonic instruments on the market know? They studied physics, text books, articles, made their own experiments to understand how it works. Others learned from existing designs, copied it in part, possibly improved it.
 

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