In a rigorous and delicate laboratory environment, pipettes are indispensable liquid handling tools, and their accuracy and reliability are directly related to the success or failure of experimental results. The excellent performance of the pipette is largely due to its carefully designed various accessories. These accessories are like the "right arm" of the pipette, which not only expands the function of the pipette, but also improves its flexibility and precision in experimental operations.

1. External accessories 1. Pipetting tip (tip) (1) Definition: A transparent tubular container used to connect the pipette and the container of the liquid to be pipetted. (2) Features: There are different types and specifications, and the volume of liquid suction and injection can be adjusted to make it more accurate and convenient. (3) Material: usually made of plastic, with different shapes such as tapered and round. (4) Usage: Usually disposable, sterilization is required before each use to ensure the accuracy of the experiment. 2. Pipette (1) Definition: Similar to the pipette tip, it is also a container that connects the pipette and the liquid to be pipetted. (2) Features: Its capacity is usually less than 1ml, and it can be divided into two types: ordinary pipettes and micropipettes. Micropipettes are smaller and can precisely control the volume of liquid aspirated and released. (3) Application: More commonly used in microbiology, molecular biology and other experiments. 3. Suction filter (1) Definition: A transparent filter that can be used to filter liquids containing impurities. (2) Function: Protect the pipette tip or pipette, prevent the pipette from being blocked, and facilitate liquid movement operations. (3) Classification: Can be divided into different thicknesses, usually using a 0.2um suction tip filter for filtration. 4. The function of the shelf (1): used to place pipettes to keep the laboratory environment clean and orderly. 5. Liquid storage tank (1) Function: used to store and distribute liquids, suitable for multi-channel and single-channel pipettes.

2. Internal accessories 1. Piston (1) Function: adjust the volume of liquid and dilute the liquid. (2) Working principle: During the pipetting process, the piston can control the volume and speed of the liquid, thereby ensuring precise and effective pipetting. (3) Classification: Different types of pipette pistons are also different. Some require manual operation, while others are automated. 2. The role of the sealing ring (1): to protect the liquid inside the pipette from external intrusion and contamination, which is very important for the accuracy of experimental results. (2) Selection: Sealing rings of different materials and models have different performance and durability, so when selecting sealing rings, appropriate selections need to be made based on experimental needs. 3. Function of the filter element (1): used to filter impurities in the liquid and protect the internal components of the pipette from contamination.

3. Other accessories 1. Bracket (1) Definition: A device used to support pipettes, which can be wall-mounted, desktop or portable. (2) Function: Help users operate the pipette more conveniently during the experiment and improve experimental efficiency. 2. Measuring bottle (1) Definition: A container used to accurately measure and distribute liquids. (2) Function: Provide accurate liquid volume during the experiment to ensure the accuracy of the experimental results. 3. Adapter (1) definition: a device used to connect pipettes and accessories of different specifications or brands. (2) Function: Make the pipette compatible with other experimental equipment or accessories to meet more experimental needs.

There are many types of pipette accessories, each with its own unique role and application scenarios. When selecting accessories, comprehensive considerations need to be made based on the specific needs of the experiment and the model of the pipette to ensure the accuracy and efficiency of the experiment.

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