ONiLAB 5-50 μl Laboratory Single Channel Pipette Scientific Laboratory Micropipette Manual Adjustable Volume, High Precision, Pipettor…

Most reviews for these products are based on free items with the risk of inherent bias. This review (and that for a similar, different volume product) is based on recent purchase of multiple items for a school who have had some access to Gilson products so I can compare directly.The pipettes arrive well packed with ISO certification for each serial numbered pipette - genuine or not I can't tell but it looks ok. All we purchased worked correctly straight out of the box.The pipette feels good in the hand, outwardly similar to a much more expensive brand, The finish is good but the unit is slightly heavier and the mechanism a little bit stiffer and slightly clunky in operation - basically a little less refined than a similar Gilson. In a commercial lab running hundreds of samples per day this would probably be an issue but for short runs it is fine.Standard Gilson tips fit reliably and the ejector is good. Tested with Gilson tips the volume looks ok, being consistent and, as far as I can judge, close to calibrated volume compared to a recently serviced Gilson.I cannot comment on longevity of o-rings etc yet but there is no rattling or looseness in the mechanism and the unit feels sturdy with no likelihood of falling apart soon. However, at this time I doubt these can be economically serviced and, given the price, I would have to consider them disposable units.Would I recommend this for a FE/HE type school lab? Certainly. Most schools cannot afford Gilson/Eppendorf grade tools for "dna", and "pcr" type work - this unit is a decent alternative which looks the part, feels robust enough to last a while in inexperienced hands and is affordable enough to purchase in numbers allowing an entire class of students to get hands-on rather than twiddling thumbs in groups of four. This is no Gilson so don't expect to treasure and lock it away at the end of each day for the next ten years but it does the job well and an entire pipette is much less than the cost of a service for a single Gilson ...

Excellent piece of equipment, just what I needed

I use these for dosing/testing etc on my marine tank. Excellent addition to the arsenal required to maintain these things

This is a good micropipette for the price and its accurate. It feels comfortable in the hand and operates exactly as you would expect.To change the volume, you rotate the button to the desired volume displayed on the dial. This extends or retracts the button to change the volume, I would have preferred it if it only changed the amount you can depress the button to the first stop but perhaps that's because that's what I'm used to, there is no issue with the operation. A further press to thr second stop will purge the tip.The tip ejector works perfectly, feels a little stiff when trying actually eject a tip but perhaps I put the tips on a bit too firmly.You get a single pipette tip and a pipette holder that can be stuck to a surface with the 3M sticker. Different mounting option would be better but I don't plan to hang mine so it's not a problem for me. A few more than a single tip would be nice, you can buy additional tips which isn't a problem but a few more for starters would be good. Even if you aren't dealing with contamination, the tips lose their repellency and lose their accuracy if you continue using the same one so you will need to buy more.The biggest letdown for me is that you aren't able to re-calibrate this in the event that you need to. I would hope that you don't but it's good practice to check the accuracy. You would need to buy a new pipette all together which at least these are too expensive.Overall, I would recommend this for non-important tasks.

Used for dispensing Metformin daily once it is adjusted good results.

As a biochemist, I have been using these for most of my career. Checked the dispensed volume by weight at 500 µL and ended up with a mean volume of 504 per shot.

Absolutely rubbish product l. Doesn’t work with the device. Does grab the ingredient in this case blood and spills everywhere !

Perfect for its purpose, works well.