Keras
National Hazard
Posts: 810
Registered: 20-8-2018
Location: (48, 2)
Member Is Offline
|
|
Mini- (or micro-) hot plate / stirrer
Folks,
does anyone know about very compact/portable hot plate/stirrers, typically for microscale experiments? Say, max 10x10 cm. It seems Ohaus made one but
has been discontinued. Some Chinese producers have references (Vevor, Joanlab), but I’m not sure how reliable they would be.
Any hint would be greatly appreciated!
|
|
|
j_sum1
Administrator
Posts: 6237
Registered: 4-10-2014
Location: Unmoved
Member Is Offline
Mood: Organised
|
|
For small scale stuff, I have made good use of a stirrer made from a computer fan with some neodymium magnets stuck on. I once had a lump of metal in
a test tube stirring for a week to dissolve it.
Addition of a heat gun can give you the heating.
Here is a cheap idea for a small hot-plate:
These soldering pots are pretty cheap to buy and occasionally very useful.
Or, you can just use a large hotplate-stirrer. It will take up some bench space, but with a suitably sized stir bar and an oil bath to stabilise the
temperature, I don't think there should be many real problems.
|
|
|
Keras
National Hazard
Posts: 810
Registered: 20-8-2018
Location: (48, 2)
Member Is Offline
|
|
Well using a large stirrer is somewhat clumsy. To have good stirring you must centre, say, the RBF on the stirrer. But then my microscale glassware is
so small the whole distillation set can easily fit on the plate (the RBF must be 2 cm wide, and the condenser maybe 6/7 cm long). So I end up with the
whole set hovering over the heat source, which is far from ideal.
|
|
|
Sulaiman
International Hazard
Posts: 3581
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
For my NS10 (ST 10/14) kit I sometimes used an IKEA tealight candle,
produces about 35W of heating power - if you don't need stirring.
A small spirit lamp can give a cleaner and/or hotter flame, but I need to make a new one.
PS I also have two of the solder baths that j_sum1 gave a picture of.
One 100mm dia. and one 38mm (from memory) dia.
Both useful for oil baths.
I have no stirring option at this scale, yet.
[Edited on 28-5-2024 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
Keras
National Hazard
Posts: 810
Registered: 20-8-2018
Location: (48, 2)
Member Is Offline
|
|
I think I’ll test the mini (12x12) hot plate / stirrer made by Vevor. It’s Chinese, but at ca. 50 € price point, if it breaks down quickly, my
bank clerk won’t hold me a grudge for long.
|
|
|
bnull
Hazard to Others
Posts: 204
Registered: 15-1-2024
Location: Between the Atlantic and the Pacific Ocean
Member Is Offline
Mood: Sleepy (again)
|
|
If it breaks, you can either fix it yourself or use it to house a new circuit. Not bad.
Quod scripsi, scripsi.
B. N. Ull
P.S.: Did you know that we have a Library?
|
|
|
ManyInterests
National Hazard
Posts: 847
Registered: 19-5-2019
Member Is Offline
|
|
I have a small hotplate stirrer. It isn't very good and I regret buying it. But it depends on what you want to accomplish? What kind of experiments
are you looking to do? How hot do you want things to go? How much (in ml) are you trying to go for?
|
|
|
Keras
National Hazard
Posts: 810
Registered: 20-8-2018
Location: (48, 2)
Member Is Offline
|
|
All kind of things from refluxing to distillation. The max. capacity of the glassware is 25 mL.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
