Per our conversation…
I am familiar with VWR, and the ONLY problem I have about them is they are a bit sketchy with specifications. You should call a representative of VWR and ask for the specs of this particular unit [97042-626]
Last I know this sold retail [medical/pharma industry] for about $350USD new, but don’t be fooled by the retail price. I would want to know what RPM this is listed as…0-1000, 0-1500, 0-2000, etc.
That will tell you the level it is rated. This appears to be entry level, like most others , would list as SH-1, SH-2, SH-3 etc
and will tell you about the strength of the magnet…and it should be a single bar magnet, not two separate magnets, and on a continuous use motor.
I will find a link for you…for this, and VWR, when I get a minute.
I don’t know this seller either, but these particular pics look good, but I would ask for the particular pics of the exact one he was selling you, since he has two for sale. If this stirrer is this clean, it was not used in a lab using caustics.
ANY mag-stirrer you get, especially used, DO NOT EXPECT it to begin stirring before you turn it almost halfway…when using VG. You start it after you choose the stir bar for the size beaker, then you adjust the rpm downward.
Lab stirrers are replaced generally after hours of service, and it doesn’t mean anything is wrong with them, but magnets lose power over time…
I have stirrers that cost $1000+ and not even used 250hrs, BUT they are over 10yrs old. They still kick serious ass, but the magnets are not as strong as when they were new.
I still use a 65904 that I bought over 30yrs ago [the one in the thread] and at least 4 days/week, and it saw commercial use most of it’s life. I mix 70VG/30PG in 115ml batches, using 250ml low form beakers, because I believe e-juice blends the BEST at that volume. Sometimes up to 400ml batches for bases. You have to learn what stir bar(s) are compatible. One size does not fit all (stir bars), and all beakers are not lab quality with compatible flat bottoms meant for mag-mixing.
For the $$$ and the clean exterior, I would give it a go, but only after the research/questions I posted above. Just because it is clean vs nasty…does not make it better. Depending on the model, I would pay twice the price for a nasty, ugly, funky-looking Barnstead versus a clean pretty little entry level.
One suggestion is…for $25-$35 more, you can find a Biffee SH-2, or similar…and get it new.
I will look for the link now.