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Stir plate wont mix a 5l. flask

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Pi:
Tried a larger magnet but i think the bottom is too thick. Thought about getting a Black Maxx but too $$s. any ideas?

jmcamerlengo:
what type of bar and what type of plate. How much volume did you have in the flask? Also do you know how many volts your stir plate is putting out. 6/9/12?

PSUhomebrewer:
Most of the homebrew comercial stir plates use two small magnets that only hold a 1" bar well. Though a 1" bar will not stir 5l by any means.

Best option would be to look for a lab surplus stir/hot plate since they have an actual bar magnet and will work with bars from 2mm to 3inches. If that isn't possible you can build one using 2 bar magnets (think for expansion for larger bars) that will hold anything from 1inch to how ever big the bar magnets span.

tygo:
My stirplates are from http://www.stirstarters.com/.  1" stir bars handle a 4.5L starter in a 5L flash just fine.

hopfenundmalz:

--- Quote from: tygo on July 17, 2012, 05:23:01 pm ---My stirplates are from http://www.stirstarters.com/.  1" stir bars handle a 4.5L starter in a 5L flash just fine.

--- End quote ---
These also use 2 small, but powerfull Neodynium magnets. Yeah, it can do a 5L starter. I know this works!

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