The extended suction head is made of medical-grade polypropylene material and manufactured in a clean environment. Precision mold and professional production process ensure that the suction head has a smooth inner surface and the same size. Because of the length, it can be directly inserted into the bottom of the tube suction, no need to tilt suction. After inserting the bottom of the tube, it does not touch the tube wall to avoid cross-contamination.

"As long as the suction head can be installed, the suction head can be used" - this is almost all users of the general understanding of the suitability of the suction head, Xiaobian this statement can be said to be partly right but not right.

The extended suction head that can be installed on the pipette can indeed form a pipette transfer system to achieve the pipette function, but is this reliable? The answer to this question requires actual data to speak for itself.

1, you may wish to match the pipette with the suction head for performance testing. After washing the suction head, repeat the sample adding operation several times, weigh the sample adding amount each time, and record the reading.

2, according to the density of the test liquid converted into volume and then calculate the accuracy of the pipette operation

So what are the least points a good suction head should have? A good suction depends on concentricity, taper, and an important point is adsorption

1, let's talk about the taper: if it is better, it matches the gun very well;

2, concentricity: concentricity is the suction nozzle of the suction head and the vertical circle at the link between the suction head and the pipette seems to be the same center, if not the same center it indicates that the concentricity is not good;

3, adsorption: adsorption and the material of the suction head, if the material of the suction head is not good, it will affect the accuracy of the pipette, resulting in a large amount of liquid retention or referred to as wall hanging, resulting in pipette error. So we should pay special attention to the above three points in the choice of lengthening suction head!