Hotplate/Stirrer

[CharlieBigpotato]

As we have the "no sources"-policy here,can somebee give me
"general" reccomendations on a hotplat/stirrer?Any special
features to look for?For example,how big would it have to
bee to bee any good,like if one wanted to do the BrightStar
synth?

[Rhodium]

An IKAMAG® brand hotplate/stirrer is what you want.

[weedar]

Of course,I had to check out what these were...
Rhodium,can you reccommend anyone of their models?

I like the one with the picture of a cat on it..
Edit:Ooops,just discovered the animal-pictures weren't
how they were made..Hope somebee finds the page where they
sell those hotplate w/animals though,it was funny..
Weedar
Me fail English?That's unpossible!

[Rhodium]

Any IKAMAG is good enough for you, what model you choose is up to your wallet.

[pickler]

Swim has a 6"x7" hotplate/stirrer that works great. No need in getting a thousand dollar hotplate if you can use a one hundred dollar one. Pm me if you need some more details.
I went into the business for the money, and the art grew out of it.-Charlie Chaplin

[CharlieBigpotato]

That was good advice,I found what I was looking for..

Weedar,I also found that page you found,I think.Very nice
stirrers!

Greets!

[scram]

Ika is the definately the stirrer with the strongest magnet I've ever seen...Unbelievable. Pay the extra cash to order one of those. I wish I had ripped one off when I had the chance. The only one I've seen that is next to it is the old Cole-Parmer 6x6 stirrers. Don't get Corning. They suck!

[algae]

Would anyone recommend digital readout?  Advantages/disadvantages?

[Osmium]

Unnecessary.
The RCT basic/RET basic work very well for all your stirring needs.
I'm not fat just horizontally disproportionate.

[noj]

The older Corning hotplates are better than the newer ones they sell. The new ones can't even handle 27.5g Al in MeOH. Which means I have 3 new ones that collect dust and 1 old one that has faithfully served me well for 2 years. The old Corning 351 can handle a 5gal bucket or a MM reduction at 6x scale.
there's a big difference between criticizing your government and criticizing your country

[pickler]

that's the exact one swim has noj and it does work wonders. Cheap and does the trick.
I went into the business for the money, and the art grew out of it.-Charlie Chaplin

[becomezen]

but why are hotplate/stirrers listed with a temp range of say 60-300°C ...... can this unit not pull a steady 50°C ? Or is it just not verified to be stable outside the listed temp range ?
Slowly , steadily , strongly , becoming zen.

[Rhodium]

Exactly, not all of them can be turned on at such a low energy output. But when do you need to set your hotplate temp to below 60°C?

[RoundBottom]

another combo plate comperable to the older cornings is the thermolyne 1000.  it's major drawback is its height, about twice that of the corning.
Nymphomania is not a disease  - its a goal!  (Methadist on Rosemary Kennedy)

[Osmium]

> hotplate/stirrers listed with a temp range of say 60-300°C

That is the SURFACE TEMPERATURE of the hot plate! Doesn't mean that you can bring a flask to 300°C!

You can easily set any temp you want, even below 60°C, when you use one of these external switching thermometers and an oil or water bath as a heat sink. I've personally put a 300mm (1 foot) diameter glass crystallising dish with 2 liters of oil and a stir bar in it on top of these stirrers, stuck the temp. probe into the oil, and managed to keep the temp at a steady 40°C. Of course the same can be done with much smaller oil baths, I've done the same with only 100ml oil in an 80mm dish too.
The reason is that the built-in sensor in the heating plate of the stirrer is lagging behind the actual heating taking place by a few seconds due to the mass of the hot plate, so one easily overshoots the desired temperature by a few degrees when no heat sink like a water bath or flask is present. The built-in temp probe and electronics aren't that sensitive either, they can tell the difference between 60°C and 70°C but probably not between 60°C and 62°C.
Just use an oil or water bath in conjunction with a switching thermometer and you can achieve exactly the temperature you want in your oil bath. This of course is only useful when you run reactions at a specific temperature, it's completely irrelevant for distillations!!
I'm not fat just horizontally disproportionate.

[nutlin]

I've heard mixed opinions concerning the Corning 351. Someone i talked to said theirs couldnt handle and 27.5g Al in MeOH. But mabe theirs was faulty. Anyone else have any imput on the Corning 351?

[handsfull2]

I have a corning 351 combo and it works great .
Paid a dollar for it at a yard sale.......
    
  "Go ahead jump  "  

[goiterjoe]

although not my favorite hotplate/stirrer, I've had one that functioned fine.  the thing would get hot, but the stirrer on it was fairly weak.  On second thought, most reactions I had that involved heavy duty stirring for I would use just a heavy-duty stirrer.
All paths are the same: they lead nowhere

[William_Omblome]

I've seen these somewhere but they are really expensive.

[wyndowlicker]

Barnstead/Thermolyne

Cimarec stirring hotplate 7X7 Swiw hears they work great!
Counting starts by candlelight all are dim ,but one is bright.-GD