Monitoring liquid flow.
Good Afternoon,
I want to use the basic stamp to monitor the flow of water past a certain point, and then
save the information to a laptop. My first challenge is to select a sensor that will work
with BS2. Any suggestions from anyone?
Thanks
Ken
I want to use the basic stamp to monitor the flow of water past a certain point, and then
save the information to a laptop. My first challenge is to select a sensor that will work
with BS2. Any suggestions from anyone?
Thanks
Ken
Comments
Some flow meters work with a little impellor that turns in the flow, and it gives out a pulse to the monitoring hardware. The Stamp can count pulses.
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Tracy Allen
www.emesystems.com
Do you where i can buy a Flow Meters that will not cost an arm and a leg
Some flow meters work with a little impellor that turns in the flow, and it gives out a pulse to the monitoring hardware. The Stamp can count pulses.
Thanks For any help that you can give me in this matter
Sam······································
Here is a cheap solution, but·I don''t know if it will work for you as we don't know what your application is.
When I was building my beer making machine (RIMS type, for any brewers out there) I wanted to be able to monitor the flow of wort through the system. Like you, I was shocked at the price of "real" flow sensors. ·I got what was called a "flow indicator". This is a clear plastic housing with a little impeller. As designed, it shows flow just by seeing the impeller turn. What I did was add a photodiode/led and count the turns. With a little experimentation I got it pretty accurate. The only disadvantage is that it doens't work when I make a stout or porter, as the wort is too dark. I could probably fix it with a switch and a lower value resistor for when I make a dark beer, but I haven't bothered.
Anyway, it is a· pretty humpty solution, but if you are not doing a dark liquid, it might work for you. The "flow indicator" was < US $20 if I remember correctly.
Jonathan
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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot
I don't have a specific suggestion on the arm and leg issue ($200 up, up for industrial quality). And I agree, it depends on the application, and a clever workaround might do the trick. Vernier has a nice little open channel flow probe for $129.
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Tracy Allen
www.emesystems.com
Using a clear PVC or acrylic tube you could place a ball the correct diameter (to be determined by flow rate and tube size), use a stainless steel bal and place sensors on the outside of the tube to read the level of the ball. An array of LED's on the side of the tube could be used to see the ball at various levels.
Course I don't even know if the water is under pressure in your application or even if the water is clear so that's my idea.
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Think outside the BOX!
to Monitor the flow of water, and if it dropped below a certain level. It isn't in a Channel exactly, but I
suspect that once I see it, I'll be able to place the impeller where I need.
Thanks for all the advice
Ken
I want to Thank All of you that Reply to my post i had look in Kele parts book but they want alot of money for them
The reason i am asking all of this i have some projects that i would like to do but·unless i can find a low cost way of
of doing them they will not get built
L_Gaminde
Do you have a part ## for this part
I was unfortunate to have to work on a friend’s espresso machine they use some nice flow sensors made of brass and stainless. They have duel magnets with a single pickup at around $50.00
Thanks for you post· do you have a web page where i can order one
metron9
Do have any pictures of these flow meters
I have some flow meters that use a small sphere, the water flows in the bottom and out the top, the sphere rides in the water, the higher the flow the higher the ball is in the chamber.
Tracy Allen
Do you a web page for them where i can look at them
Vernier has a nice little open channel flow probe for $129.
Jonathan
Do have any pictures of these little impeller and where i can order these from
This is a clear plastic housing with a little impeller. As designed, it shows flow just by seeing the impeller turn. What I did was add a photodiode/led and count the turns. With a little experimentation I got it pretty accurate.
·Anyway, it is a· pretty humpty solution, but if you are not doing a dark liquid, it might work for you. The "flow indicator" was < US $20 if I remember correctly.
Sam
http://www.bluwhite.com/
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Think outside the BOX!
Thanks for the web page that helps alot
Sam
That is an open channel flow meter. Vernier makes products for educational use.
The principle of these flow sensors is basic stuff. Say, a paddlewheel in the stream. The expense of industrial models comes from special materials, precision machining, care for hydrodynamics, and calibration. As usual, the technical pages at Omega.com have a lot of information about the gamut of different technologies that are used for flow metering.
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Tracy Allen
www.emesystems.com
http://www.plccenter.com/buy/BLUE+WHITE/F40500LN
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Think outside the BOX!
Sorry, I don't have a picture. My beer machine is residing at a friends house at the moment. You mention "open channel", if that is the case, a small DC motor with a paddlewheel connected to an ADC or even RCTIME could indicate flow.
Jonathan
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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot
http://www.cafeparts.com/listCategoriesAndProducts.asp
I would like to Thank You·all· for the help that you have given me in find a Flow Meter that would not cost me an arm and a leg
Sam····
···········These Guys are having to much FUN·······