Definition: Serological pipettes, also known as "Serological transfer pipettes," are calibrated glass or plastic pipettes designed for the measurement and transfer of liquids. They typically have graduations along their length, indicating volume, and they are used for general-purpose liquid handling.
Usage: Serological pipettes are commonly used for a variety of laboratory applications, such as in cell culture work, microbiology, and chemistry. They are suitable for tasks that do not require high precision but still demand accurate volume measurements.
Calibration: Serological pipettes may have one or more calibration marks along their length, and they are designed for delivering the desired volume without the need for precise accuracy. They are often marked as "To Deliver" (TD) or "Ex" to indicate the calibrated volume.
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Definition: Volumetric pipettes, on the other hand, are specialized laboratory glassware designed for highly precise volume measurements. They have a single graduation mark at the top, and their design is focused on delivering a single, specific volume accurately.
Usage: Volumetric pipettes are used when high precision and accuracy are crucial, such as in analytical chemistry, titrations, and the preparation of standard solutions. They are not meant for general-purpose liquid transfer but rather for highly specific, precise measurements.
Calibration: Volumetric pipettes are typically marked as "To Contain" (TC) to indicate that they contain the specified volume when filled to the mark. These pipettes have a single, well-defined calibration point.
Purpose: The primary difference lies in their intended purpose. Serological pipettes are versatile and used for general liquid transfer where high precision is not required. Volumetric pipettes are designed for very precise measurements of a single specific volume.
Graduations: Serological pipettes have multiple calibration marks along their length, offering a range of volume measurements, while volumetric pipettes have a single, distinct calibration mark at the top.
Calibration Mark: Serological pipettes are marked as "To Deliver" (TD) or "Ex," indicating the calibrated volume that can be delivered. Volumetric pipettes are marked as "To Contain" (TC), indicating the volume they contain when filled to the mark.
Applications: Serological pipettes are suitable for applications where precision is not critical, such as general liquid handling and sample transfer. Volumetric pipettes are reserved for highly precise applications, such as analytical chemistry, titrations, and the preparation of accurate standard solutions.
In summary, serological pipettes are versatile, with multiple graduations, and are used for general liquid transfer, while volumetric pipettes are highly precise, designed for specific volumes, and used in applications requiring a high degree of accuracy.
