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Pipettes are used in laboratories to accurately measure and transfer liquids. They are essential tools in various scientific fields, including chemistry, biology, medicine, and environmental science. Pipettes allow for precise liquid handling, which is necessary for tasks like preparing solutions, mixing reagents, performing titrations, or transferring biological samples. There are different types of pipettes, such as manual micropipettes for small volumes (microliters), serological pipettes for larger volumes (milliliters), and volumetric pipettes for highly accurate measurements of fixed volumes. Pipettes are also critical in medical and diagnostic laboratories for transferring blood, serum, or other biological fluids. In essence, pipettes are used whenever precise liquid measurement and transfer are required in a laboratory setting.