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Lab Pipettes

Pyrex serological pipettes

Lab pipettes, also known simply as pipets, are essential tools used in laboratory settings for precise measurement and transfer of liquids. They are graduated glass or plastic tubes used in sample preparation, serology, cell culture, calibration, and chemistry. They rely on the use of a pipette dispenser such as a bulb, or pipet controller to draw up liquid for measurement and dispensing. Glass pipettes may be reusable, provide high-accuracy measurement, and are compatible with harsher solvents. Plastic pipettes avoid the problem of glass breakage and are available in polystyrene (combining high measurement accuracy with the convenience of plastic) as well as polyethylene and polypropylene for broader chemical resistance.

Pasteur Pipettes

Pasteur pipettes, also known as transfer pipettes, pastettes, or droppers, are commonly used for transferring small volumes of liquid, typically less than 10 mL. Pasteur pipettes can be made of glass requiring a separate bulb or rubber teat to fill and dispense liquid, or polypropylene with an integrated bulb. They are available ungraduated or graduated for liquid measurement. Also, they are ideal for general laboratory tasks, such as adding reagents or making dilutions.

Plastic Pasteur pipettes are commonly used in biology for aqueous media; however, they can't handle organic solvents like hexane or acetone. These solvents dissolve the plastic, thus applications requiring solvents need to use glass Pasteur pipettes. They are difficult to clean, so they are usually disposed of as biohazard waste after each use.

Serological Pipettes

Serological pipettes are commonly used to measure and dispense milliliter amounts of liquid. They are available in sterile options for aseptic cell culturing procedures or non-sterile for general lab dispensing.

Cotton plug options are available to prevent overfilling and safeguard against potential contamination from airborne particles or microorganisms. Large tip pipettes are available for pipetting viscous liquids and suspensions. These pipettes feature wider tips, allowing for smoother pipetting and reducing the risk of blockages or inconsistent liquid flow. Large tip serological pipettes are particularly useful when working with viscous liquids, such as oils, gels, or high-density solutions, ensuring efficient and reliable transfers.

Aspirating Pipettes

Aspirating pipettes, also known as suction pipettes, are used to remove or aspirate liquids from vessels without measuring the volume. These pipettes are designed with a tapered or conical tip that enables controlled suction and dispensing of liquids, and they are typically used in conjunction with a pipette controller.

Aspirating pipettes are commonly used for a variety of applications, including the removal of excess liquid, such as supernatants or waste solutions, from samples or containers. They are particularly useful in procedures like cell culture, where precise removal of media or reagents is necessary.

They are typically ungraduated, sized for capacity only, available plugged or unplugged, sterile or nonsterile, and made from plastic or glass.

Volumetric Pipettes

Volumetric pipettes, also known as bulb pipettes, are calibrated to measure a fixed amount of liquid with high accuracy. The pipette has a wider reservoir between two elongated sections and a single graduation mark to draw an exact volume. Calibration can be set as “To Contain” for removal of liquid, or “To Deliver” for dispensing liquid. They are commonly used in analytical chemistry to make laboratory solutions from a base stock as well as to prepare solutions for titration.

Volumetric pipettes are available in different capacities, ranging from microliters to milliliters, to accommodate various volume requirements. They are often made of high-quality glass to maintain chemical resistance and accuracy.

Eppendorf Pipettes

Eppendorf has been a trusted provider of high-quality laboratory instruments and consumables for life science research and clinical testing since 1945. With their commitment to research, development, and stringent quality control, Eppendorf sterile serological pipettes consistently deliver accurate and precise results.

Corning® Pipettes

Corning pipettes are reliable and precise laboratory tools designed for accurate and efficient liquid handling. They are available in various types, including serological, micropipettes, and volumetric pipettes with different volume capacities to suit different applications.

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