1. Leakage:

In severe cases, it can be seen that the liquid level in the head drops directly; Sometimes it is not noticeable to the naked eye, but there is leakage, which can lead to inaccurate pipetting results;

2. Uneven discharge fluid level:

When the suction head is installed in place, the liquid level in each channel is still uneven, which will lead to pipetting error;

3. The suction head falls in the middle:

Not only does pipetting have to be re-done, the sample is also wasted or even contaminated, affecting the efficiency and results of the experiment.