|
Posted by SumGie on November 15, 2008, 11:24 am
> lefty wrote:
>> Has anyone come across a liquid flow meter with a digital output? I
>> have an application in which I need to deliver a fixed (programmable)
>> amount of a liquid, and any of the industrial solutions I've seen are
>> both bulky and expensive.
>> I'm thinking something like an arduino board as the smarts, but the
>> key part would be a means to measure the volume of liquid, and send
>> out a signal which can either be read periodically, or if a fully
>> contained batch measurement unit, then send a signal when the amount
>> has been delivered, to allow the controller to hit the relay on the
>> solenoid valve ... or similar ...
>> Pointers would be appreciated ...
> If you're measuring flow rate, look for a venturi flow meter or the like.
> If you're measuring a fixed volume, a simple float on a toggle switch has
> proven effective (open the back of your toilet). A digital scale is also
> good.
> - Daniel
And if you want to control the volume (measuring it was just a way to tell
when to shut it off) then there are pumps which will deliver a set amount
per revolution, just count the revs. They come in all sizes for all
volumes-per-second...
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML site map
> have an application in which I need to deliver a fixed (programmable)
> amount of a liquid, and any of the industrial solutions I've seen are
> both bulky and expensive.
>
> I'm thinking something like an arduino board as the smarts, but the
> key part would be a means to measure the volume of liquid, and send
> out a signal which can either be read periodically, or if a fully
> contained batch measurement unit, then send a signal when the amount
> has been delivered, to allow the controller to hit the relay on the
> solenoid valve ... or similar ...
>
> Pointers would be appreciated ...