Magnetic Stirrer Magnetic Mixer (with stirrer bar) 3,000 rpm Maximum Stirring Capacity: 3000 ml

Muy útil y práctica por el tamaño. Funciona adecuadamente.

If you buy one and the little magnet just lays there and just vibrates, turn the unit off; the magnet will center itself, then turn it on and slowly increase the power. this is good for vary vary light mixing, any solid matter that hits it will knock the magnet off it's spin and it will go back to just vibrating

Good

Update: After playing around with different sized stir bars I found that 25mm works better than 30mm for a standard mason jar as well as various flasks and media bottles. Either the standard cylindrical or type B with a center spin ring work well. The shorter stir bar appears to mix solutions just as well as the longer, but able to obtain faster rpm with fewer spin outs. Maybe the unit comes with a 25mm bar for a reason. Duh! I can’t attest to the magnet strength, but it works well enough for me to upgrade to 5 stars. It seems that everybody working with liquid cultures owns at least one of these. For $20 it’s hard to find a basic stir plate with better reviews. That said, my experience is mixed. The price is right, sure, but the magnets are weak. Trying to get a standard 30mm stir bar centered and spinning in a quart size Mason jar is a challenge. The bar tends to get thrown to the side and stuck in the ditch perimeter of the slightly convex interior center. If the speed is ramped up too much it’s thrown off center and back into the ditch. Once centered and spinning at a low to moderate speed, it works well enough. I plan to try stir bars with a center spin ring to see if that helps. Compared to my Lab House hot/stir plate this is far inferior. Granted the other cost 3X more. I’d give it 2-3 stars based on performance alone, but for $20 I’ll be generous with 4 stars. YMMV

I'm sure the Stirrer does the job, but can't if it only has a US plug on the power adapter. What's the point of selling items like this in the UK if it doesn't have a UK plug. Buyer be warned.