Hi all,
I am looking for an arduino compatible direct non-invasive flow sensor that can measure fluid flow through a artificial "blood vessel" that is cheap and can be used for a project I am working on. Is there one that can be purchased which can measure flow as low as about 160 mL/min? If so, can you please provide a link for purchase. If not, what other sensors are available for purchase which could be used for my prototype?
What will it be made of?
Need direct non-invasive flow sensor (>$500) for project
Have you used the correct mathematical symbol in the title of this topic?
The symbol '>' is used to indicate 'greater than'.
If you wanted to spend less than $500, then it should be (<$500).
Opps! Sorry! I just changed that thank you!
likely out of silicone but, if we find the right sensor we can find a way to prototype with it. We were interested in a sensor similar to the way a TTFM works clinically, again not binded to any one idea.
My cardiac doctor does it with ultrasound, but I doubt you will find an instrument like his in a hobby shop. 
Well, I'm just looking for a sensor which can measure flow through a tube for a design project. Prototyping is the fundamental of being a hobbyiest, nothing you got to worry about with your cardiac doctor. :)
Check out the topic of the discussion before you start commenting on posts, wikipedia isn't the discussion
Well, the article had to do with measuring fluid flow (blood) through a tube (artery), guess it was way over your head. Sorry, won't happen again.
???
Telling the speed of the blood inside there? Did recently see my heart working but no such data seen.
I'm looking for if an Arduino sensor exists that can take the measurement.
Yes looking to measure blood velocity in mL/min. If a device like that doesn't exist I found Ultrasonic Transducers that take a similar measurement:
Or:
The only other concept was to use an ultrasonic sensor like the HC-SR04 to measure time it takes for signal to travel then translate that measurement to determine speed of volumetric flow.
I have removed the insults and associated comments.
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I see devices on Facebook that might be the basis of your device. They are water leak detectors. There will be no sensor that produces an out put in direct speed/volume numbers. You will have to take some type of sensor output and compute the answers you need.
Hmm, thank you Paul. What sensors would you recommend could be used as well as with which Arduino microcontroller? Can you please share those facebook links as well?
Just when you want to see and ad, they all go away! But I did find one the hard way.
That's a flow rate (volume/time) not velocity (distance/time).
Medistim makes a TTFM probe that meets your flow requirements, but you haven't said what tube diameter. Unlikely to be directly Arduino compatible.
The HC-SR04 is not suitable for your project. Its transducers are only suitable for use with air.