Scientific Microchemical Disposable Pipette Pipettor Review

EDIT: The company went out of their way to contact me and refunded the entire purchase without asking for a refund. Update the rating to reflect this. It was a total mess. Without sealing and sterility.

They are reusable for my application. If you need something that can really be used once and thrown away, they can be a bit pricey. My only criticism is that there is no empty space at the top, so if you pipette backwards the liquid can get into the pipette too easily. The obvious solution would be to buy a tip that has slightly more capacity than you need, but that seems to be the largest size available.

Received the pipette yesterday. I took it to work today to try. It's relatively cheap, so my expectations were moderate. Although it was a busy day, I finally got a chance to try it out for a few minutes. To evaluate the instrument, I used the analytical balance in our laboratory. Tenths of milligrams can be resolved when reading to 4 decimal places. I randomly selected 4 samples. I set the pipette to 5 mL and drew 5 mL of Type I deionized water and checked the mass of the collected sample with