Video: Magnetic Stirrer Gizmo for water tests

melev · Jun 19, 2016

This thing is so cool.

Up2no6ood · Jun 19, 2016

I made one a few years ago out of an old pc fan, some acrylic and 2 magnets. Works great!

reefwiser · Jun 19, 2016

Simple and inexpensive
NEW Taylor 9265 Magnetic Stirrer Speedstir Start-Up Pack w/ Stir Bar + Batteries https://www.amazon.com/dp/B004BGPC5W/ref=cm_sw_r_cp_api_mbZzxbH36GBYF

Macdaddynick1 · Jun 20, 2016

Where can I find a bigger version if this ? I would love to put aminos on autodoser

melev · Jun 20, 2016

Macdaddynick1 said:
Where can I find a bigger version if this ? I would love to put aminos on autodoser

Bigger ones are available online. Check Amazon, Ebay, or Google.

Macdaddynick1 · Jun 20, 2016

Found it, thank you

ZJedi945 · Jun 20, 2016

Very cool! I might have to pick one of these up.

dbrewsky · Jun 20, 2016

hurry up and get that stir plate in your store

You could work with the guy building these to develop sleeve inserts for the stir plate to accept common test kit vials. Beauty of 3d printing is that he can change the collar and mock up the inserts to hold salifert/elos/redsea/nyos etc

adroc718 · Jun 20, 2016

dbrewsky said:
hurry up and get that stir plate in your store You could work with the guy building these to develop sleeve inserts for the stir plate to accept common test kit vials. Beauty of 3d printing is that he can change the collar and mock up the inserts to hold salifert/elos/redsea/nyos etc

Yes please!!!!!

or if hes not going to be making any available soon I think you should crack open that case and reverse engineer that sucka!
Im sure the folks on the forums will be able to source the parts and mock up DIY.....must be a super small fan in that little guy.
Come on Marc lets see the innards!!!!! lol

Also just as a side ?.....does anyone think that the speed of the stirrer or the friction it causes would induce heat, and if so would the heat generated by the spinning be enough to effect the water sample?

dbrewsky · Jun 20, 2016

stir plates and bars are by no means difficult to make, they have been a big diy project for home-brew yeast cultivation. The beauty of this is a potentially reasonably priced unit designed specifically for our needs. Without having to source parts or build a much larger than needed unit based off of computer fans. The stir bars in those units have rather small contact points with the glass and friction heat would not be an issue for these tests.

morpheas · Jun 20, 2016

I already use an off the shelf mini stir plate bought off of ebay. I like this design though and the one in the other thread. It should be fairly straight forward to put together plans for the 3d printing with a motor/magnet/potentiometer... I might pursue (since I have a printer at home) and if successful I'll upload everything here for your guys... Sounds like a fun project

Pruett-nc · Jun 20, 2016

Here is a link to one already on the market. https://sraquaristik.com/product/speed-test/

adroc718 · Jun 20, 2016

Pruett-nc said:
Here is a link to one already on the market. https://sraquaristik.com/product/speed-test/

wow! good stuff on finding a link! That looks almost identical to the one Marc has.
I just ordered one, but needed to go to a different site. The link wouldn't let me complete my order info for some reason. I reached out by email and tried calling but nothing.
I eneded up going through reefnation to order. Around $60 with shipping. Prob couldve been a $10 DIY but who has time!

fragman2 · Jun 20, 2016

I watched the video on the SR Aquaristic Speed test and it does look similar. But without the built in LED light. I want one with the light!

AcroJack · Jun 20, 2016

I have the SR one and it works well. love using it with Red Sea nitrate and potassium tests!

HOOPDEEZ · Jun 20, 2016

These are used in any chem/bio/biotech etc. lab I'm sure you could google it and find a source for used lab equipment. These would be good quality/high longevity units and maybe a decent price. worth looking into

MACNA2016 · Jun 21, 2016

Would using the bigger glass vial make any difference in the reading of color through it? I'm just curious if it makes any difference using the bigger beaker instead of the skinny one that comes in the test kit. I bought the Taylor one shown above some time ago but I haven't used it yet. Just a curiosity.

reefwiser · Jun 21, 2016

No it doesn't its the reaction with the reagent that causes the color change.

monkiboy · Jun 21, 2016

I believe he means in how the reaction is read. the reaction will be the same regardless of what is used but will the size, opacity as viewed from the side, or how much wider the space of a bigger cylinder is used affect how one reads the results?