Xin Tester 5000ml Magnetic Stirrer, Stainless Steel Magnetic Mixer with Stir Bar, Magnetic Stir Plate for Sauces/Yeast Starters/Paint/Ink (No Heating) Max Stirring Rate: 2200RPM

very good stirrer for 5 Liter

One failed, bought a replacement (same type), replacement seems to be working. Cest la vie.

It makes a high pitch noise while running

I ordered this to stir liquids.PROS:Seems decentDigital Read outcontrolsCONS:Cheap buildSensitive design goes quick or quicker or just doesn'tHard to get spinning

This is a reasonably well-made magnetic stirrer. The base is pretty light weight. The stainless steel top arrived with a protective sticker that left behind some adhesive residue around the edges that was not easily removed. You also get an AC adapter and two stir bars (20mm and 30mm). The unit is generally quiet in operation.I tested it (for now) with 8 oz glasses of water, orange juice, and tomato juice. The small bar worked well in the water and orange juice and the machine easily hit 3000 rpm (not that it needed to be that fast). The thicker tomato juice required the larger bar to get the juice circulating. Above about 2000 rpm, the drag on the bar was such that it would disconnect from the rotating magnet in the unit and stop circulating the juice. If you intend to use this for thicker fluids, you may be limited to the amount you can do at any one time.The unit does not add heat and I did not test it with a heated fluid.Overall, a capably little unit for relatively small amounts of fluid.

When I first opened the box, the protective film on the top plate looked was worn away and scuffed at the edges, to the point that I thought I might have received a returned item. Happily, that wasn't the case. After removing the protective film, there was a burned-on adhesive at the edges (likely from the same manufacturing process that gave it the scraped-up look). That cleaned off using a paper towel impregnated with WD-40. 99.9% IPA had no noticeable effect.There's also a more conventional film over the display/control panel. Peeling it off reveals a much more glossy surface with sharp graphics, display, and lettering. Some people don't peel those films off -- probably the same kind of people who sit around their home in furniture covered in clear plastic.The power supply is an odd one. It's 8V @ 1A DC and quite compact. But rather than being a wall-wart, it has cords coming out both ends -- an ungrounded AC power cord on one end and the DC cord with the round, coaxial DC connector at the other. Neither is removable or user-replaceable. There is no power indicator light on the power supply itself.The man unit's case is made of a thin plastic, including the flat bottom, which flexes quite a bit. Overall, it's quite lightweight and doesn't really fill me with confidence. But it seemed adequate while I tested the unit.In use, the unit is quite a bit more buzzy than the near-silent units costing hundreds of dollars that I've encountered in labs, but that's no surprise given the cost differential.The blue alphanumeric display is very sharp and easy to read, despite the exceedingly small characters. It indicated an operating RPM of more than 4,200 rpm while running. This was a pleasant surprise given the maximum rpm was listed as 3,000 in the product description and specifications. I was using the 15mm mixing magnet "pill" in a narrow beaker-like container of water. The magnetic stirring pill didn't seem phased by spinning at that RPM and it didn't appear to lose sync with the magnet in the stirrer below it. It created a might whirlpool, though.Suggestion: Come up with some kind of steel rod for removing the pill -- something that you can insert into the container for the pill to latch onto for removal after mixing is complete and the container has been removed from the top plate. You don't want to be pouring through strainers or sticking your fingers in to retrieve it. Just cover the steel rod with something compatible with the liquids you are mixing (nitrile, HDPE, plastic dip for tool handles, etc.).At this price, with a tachometer display, there really isn't much to complain about. If this were a $90 product, I'd judge it a bit more harshly, but at anything near the current price of $40, it's a five-star deal.

This Magnetic Mixers is all plastic and a very lite weight unit, that being said the mixer gets the job done. I'm mixer thin finishes for wood and it perform well for that application. The mixer is rather noisy at high speed, I'm seeing about 75 db, but at lower speeds the noise level is much lower. This works for what I'm doing. If I have any issues I will update this review.

This is a good mixing plate. I used to work in a laboratory and from my experience, I think that this stirrer is on par with ones that I've used in a la. I like the fact that it came with a stir bar. And i have used this for preparation of a multitude of mixtures. And I've found that it does a really great job of ensuring proper dissolving so that the end result liquid is very homogeneous with no large specs or anything of that nature. It's also quite a compact little unit, so it doesn't take a lot of counter space if that's an issue for you. I'm quite pleased with the performance of this stir plate.