Pipettes are essential laboratory tools used for precise measurement and transfer of liquids. They come in various types to suit different applications and volumes. Here are some common types of pipettes:
1. Volumetric Pipette
A volumetric pipette is used for accurately measuring a specific volume of liquid. It has a long, narrow tube with a single graduation mark at the calibrated point. Volumetric pipettes are often used for preparing solutions with precise concentrations.
2. Graduated Pipette
A graduated pipette, also known as a measuring pipette, has graduations along the length of the tube. These markings allow for measuring and dispensing different volumes within a specific range. Graduated pipettes are versatile and commonly used in general laboratory work.
Micropipettes are designed for handling small volumes, typically ranging from microliters (µL) to milliliters (mL). They use disposable tips and are commonly used in molecular biology, biochemistry, and other applications requiring precise and accurate measurement of small volumes.
4. Pasteur Pipette
Pasteur pipettes, also known as transfer pipettes or droppers, are glass or plastic tubes with a tapered tip. They are used for transferring small amounts of liquid by suction or squeezing. Pasteur pipettes are commonly used in microbiology and for general-purpose liquid transfer.
5. Serological Pipette
Serological pipettes, also known as sero pipettes, are designed for handling larger volumes, typically ranging from 1 mL to 50 mL or more. They have graduations along the length of the tube and a tapered tip to facilitate controlled dispensing. Serological pipettes are commonly used in cell culture, immunology, and other laboratory applications.
A pipettor, also known as a pipette controller or electronic pipette, is a motorized device used for precise liquid handling. It allows for accurate and convenient aspiration and dispensing of liquids using disposable tips. Pipettors are commonly used in high-throughput applications, where repetitive pipetting is required.
These are just a few examples of pipettes commonly used in laboratory settings. Each type of pipette has its own design, specifications, and recommended applications. Choosing the appropriate pipette depends on factors such as the desired volume range, accuracy requirements, and the nature of the experiment or task at hand.