Wall adapter for micro pump? Please help :)

[UberPooner]

Hey,

I have been struggling so hard trying to find the correct ac/dc wall adapter for this micro pump:

http://www.amazon.com/3-12V-Water-Pumping-Electric-RS-360SH/dp/B00D82W60O

Product Name : Micro Pump Motor;Model : RS-360SH;Rated Voltage : DC 3-12V

I have tried 9v at 1.5 amp and that is to much, it starts and stops and continues the pattern.

12v at 1 amp, I get same effects as above.

9v battery, This actually makes the pump work how I want it too however, battery gets hot very quick then shuts off.

3-12v at 300mah adjustable voltage, nothing worked.

5v at 850mah, very low power, I had to smack the pump to get it started and it would continue however, at a very low speed.

Can someone please help me out, it would be greatly appreciated!

Thanks

 

[UberPooner]

I plan to use it for a diy low budget ph controller which I will make a new thread on soon (as soon as I can figure this pump situation out!)

 

[queequeg152]

be warned, what ever that thing is... its dogshit. i cant even tell if its a peristaltic or not.

if you want to continue with this, i suggest you get a decent power supply rated for 12 volts. A computer power supply would work wonderfully.

then measure the current drawn with a volt meter.

when you get that current value, go out and buy a smaller power supply that suits your needs, and that you can fit into what ever enclosure you want to use.

imho. get a real pump meant for dosing.

http://www.ebay.com/itm/110V-Gorman.../221093290007?pt=BI_Pumps&hash=item337a2fe017

i bought like 4 of these way back when they sold for 20 bucks.

you can meter with a simple limit switch. the replacement bellows are available but cost a nut, like 40 bucks for a pair.

 

[UberPooner]

Thanks for info queequeg152!

I think getting a power supply to test exact needs is a good idea. Can you please link me to something that is what your thinking, or a good searchterm I can use.

Would it be something like this:

http://www.frys.com/product/1926819?source=google&gclid=CLLgtfye2sICFYpcfgodeDIAyA

Also, the pump I showed you is a prototype pump. It has same stats as the one I want use in final version:

http://www.frys.com/product/1926819?source=google&gclid=CLLgtfye2sICFYpcfgodeDIAyA

Its pretty much same exact thing but peristaltic. Would that make it better in your opinion?

If not, what about those pumps are bad and what should I look for in ideal situation.

Again, this is meant for super low budget.

Thanks

 

[UberPooner]

Ah I got it. I used a usb power at 5v 2a and that worked.

 

[UberPooner]

Just thinking about peristaltic pumps, why does it really matter if im using diluted ph solution?

When we do RDWC we have inline pumps / water pumps and its never peristaltic.

I understand the value of peristaltic pumps however is it really needed in a relatively small system. I dont ph a lot and when I do its like 1-2 ml.

 

[queequeg152]

acids tend to get very viscous when you approach 100% concentration.

two reasons to use a peristaltic pump.

variable volume.
and because (3 roller atleast)they are always closed when power is not being supplied.

if you are adjusting ph batchwise, you do not need a peristaltic pump. a bellows pump will work fine.

a peristaltic pump is a form of positive displacement pump. as such they tend to be more linear in their pumping characteristics. this makes them more desirable for dosing applications. centrifugal pumps are non linear. at 10psi one might flow 50cfm. at 20psi it might flow 15 cfm.

 

[UberPooner]

thanks again for info!