When purchasing pipettes for your laboratory or research facility, it’s important to consider several factors to ensure you get the right pipettes for your specific needs. Here are key points to consider:
Quality: This aspect depends primarily on the materials used in the pipette. The outer casing should have high impact resistance, corrosion resistance, and low thermal conductivity (such as PVDF material); for pistons, there are mainly stainless steel, ceramic, and plastic materials on the market. Stainless steel has good mechanical properties and long service life, but it is not suitable for pipetting strong acids and alkalis; ceramics have high corrosion resistance, but mechanical properties are poor. Of course, quality materials often mean higher prices.
Accuracy and Precision:
Determine the required accuracy and precision for your applications. Pipettes come in various classes (A, B, and C), each with different levels of accuracy and precision. Choose a class that meets your specific requirements.
Consider the range of volumes you will be handling. Select pipettes that cover the full range you need, from microliters (μL) to milliliters (mL), or consider purchasing multiple pipettes to cover the entire range.
Decide whether you need adjustable-volume or fixed-volume pipettes. Adjustable pipettes offer flexibility but require more calibration and careful handling.
Ergonomics and Comfort:
Choose pipettes with ergonomic designs that reduce user strain during prolonged use. Look for features like lightweight construction, comfortable grips, and easy-to-reach controls.
The movement distance of the thumb to complete a pipetting cycle is short, which means that the comfort is higher;
The pipettes of the same range are required to complete one discharge (must be pressed to the end). The force of the thumb is the key to affecting comfort. The less force means the lower the risk of finger damage caused by long-term use.
The more convenient the loading and unloading of the tip, the better.
The weight of the pipette is moderate. Excessive weight will increase the burden on the hand, but too light will often mean that the material may be unsatisfactory.
Other auxiliary designs, such as the matte design of the shell and the finger hook design, help to further improve comfort.
Calibration and Maintenance:
Check if the pipettes come with calibration certificates or if calibration services are available. Regular calibration and maintenance are essential for accurate and reliable pipetting.
Material and Chemical Compatibility:
Consider the materials used in the pipette’s construction and their compatibility with the chemicals you will be working with. Some pipettes are resistant to acids, bases, or organic solvents.
Ensure that the pipettes are compatible with the type and brand of tips you plan to use. Different pipette brands may have specific tip requirements.
Determine if the pipettes can be autoclaved for sterilization. This is important for applications in microbiology and cell culture.