DIY doser pumps

[lanshark]

Anybody tried these ? Might have to slow them down as spec says, 5000rpm, 20-60ml output per minute.....

May pick a few up and build a box....

 

[caribbeanguy]

believe some others have tried and found that you cannot slow it down too much without the pump stopping. Think the slowest someone got it was down 75%.

 

[caribbeanguy]

http://www.reefcentral.com/forums/showthread.php?t=2098182&highlight=marine+magic

Similar style lots of information in that thread

 

[bqq100]

I use 2 of them for kalk dosing. 1 to pump from from a 1 gallon container to the tank, another to pump RO/DI from my topoff bucket to the 1 gallon container to keep it full. I've been very happy with them so far (running for 2 or 3 months now). I think mine tend to run about 70 ml/min for me, but I've never done a calibration, I just tweak and measure until I get the right time.

I just ordered 2 more because i want to do something similar with an Arduino controlled 2 part doser using these pumps. I'm hoping I can run them at 6V and get down closer to the 30ml/min range. The 75% limit in the thread above was based on PWM@12V, they should be able to run fine at 6V, but I will test that when I get them.

 

[bqq100]

I'm hoping I can run them at 6V and get down closer to the 30ml/min range. The 75% limit in the thread above was based on PWM@12V, they should be able to run fine at 6V, but I will test that when I get them.

I did a quick test and it ran at 5.13V. At that voltage the pump was about 21.4 ml/min and ~150mA.

 

[john08007]

I've read on here before someone tried 2-3 and they all gave different outputs, just something to check and keep in mind