The pipette is a kind of measuring tool that transfers liquid from one container to another within a certain range. It is widely used in biology, chemistry and other fields.

The following points should be considered when choosing a PCR laboratory pipette:

1. The shorter the distance the thumb moves to complete a pipetting cycle, the higher the comfort level.

2. The thumb force required to complete a discharge of liquid by comparing pipettes of the same range is the key to comfort. The less force means the lower the risk of finger damage caused by long-term use.

3. When loading and unloading the pipette tip, the less effort the better.

4. The weight of the pipette should be moderate. Too heavy will increase the burden on the hand, but too light often means that the material may be unsatisfactory.

5. Other auxiliary designs, such as the frosted design of the shell and the finger hook design, can help further improve comfort.

When there is liquid in the adjustable pipette tip, do not place the pipette horizontally or inverted to prevent the liquid from flowing back and corroding the piston spring. If not in use, adjust the pipette range to the maximum scale to relax the spring to protect it.