As a consumable product used in pipette, suction head is generally divided into standard suction head, suction head with filter element, low adsorption suction head and non-heating suction head according to different uses. Standard suction heads are the most widely used suction heads. Almost all pipetting operations can be performed with a common suction head, which is the more economical type of suction head. The suction head with filter element is a consumable designed to prevent penetration contamination. It is often used in molecular biology, cytology, virology and other experiments. For experiments with high sensitivity requirements, or precious samples or reagents are easy to remain, low adsorption heads can be selected to improve the recovery rate. The surface of the low adsorption head is treated with hydrophobic treatment to reduce the low surface tension liquid leaving more residue in the head.

The performance indicators of the suction head include low adsorption, filter element, sealing, loading and elastic output, no DNase and RNase, and no pyrogen. So, you know what at least a good suction should have? A good suction depends on concentricity, taper, and most importantly, adsorption. Let's talk about taper first. Well, it'll work well with the gun, and the suction will be more accurate; Concentricity is a straight view of the suction head stage and where the suction head meets the pipette. Whether concentric, if not concentric, that concentric degree is not good; The adsorption is related to the material of the suction head, and the material of the suction head is not good, which will affect the accuracy of the pipette, forming a lot of liquid residue or hanging on the wall for short, forming pipette errors; Therefore, we should pay special attention to the above three points in the selection of tips.