Doppler Flow Meters


If you have ever seen the Kill-a-Watt meter to track electric use of home appliances, you can undertsand why I was hoping for a cheap doppler meter to track liquid flow noninvasively inside piper using sound waves. I recently got a ten dollar sonic stud finder, and suspect the only reason this device can't track flow is software and not hardware. Are we likely to see home doppler meters any time soon?
                 - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist http://www.panix.com/~vjp2/vasos.htm http://www.facebook.com/vasjpan2 ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]
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On Sun, 4 Jul 2010 21:35:21 +0000 (UTC), snipped-for-privacy@at.BioStrategist.dot.dot.com wrote Re Doppler Flow Meters:

Wow! That's an amazing web site.
--
Work is the curse of the drinking class.

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====================================================
Hard to read though with all that cluttered blue-blobby background.
What bits I could see sems to be rather narcssiistic view of somebody, by himself?
Don't think I'll bother to access it again and have not bookmarked it!
BTW there are AIUI such 'no moving parts' flow meters; no idea of the costs, their accuracy or other details. But must ask my son who is in that line of business when I next see him.
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snipped-for-privacy@at.BioStrategist.dot.dot.com wrote:

No.
There are industrial flow meter solutions (doppler, transit-time, mechanical, etc).
There is no demand for a home version.
I'm some-what inclined to do home automation, and the only thing I would do along those lines would be to install a mechanical flow meter where my main water line enters the house. I'd only be interested in total water flow, not the flow to individual branches (bathrooms, sinks, toilets, etc). I'd probably install a pressure and temperature sensor at my main water supply point first before I'd ever install a flow sensor.
Mechanical flow meters are also known as turbines and rotometers.
Here's some examples:
http://www.omega.com/ppt/pptsc.asp?ref=FTB690&Nav=gref02
http://www.omega.com/ppt/pptsc.asp?ref=ftb8000b&Nav=gref02
I've worked with doppler and transit-time flow meters used to measure blood flow in biomedical applications, so I know how they work and why they are the preferred tool to measure blood flow in arteries in living subjects. But for home water consumption, I wouldn't go with ultrasonic.
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Some@Guy wrote:

My utility provided one of those for me.
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