What is the difference between a serological pipette and a graduated pipette?

The main differences between serological pipettes and graduated pipettes are:

– Use: Serological pipettes are used to transfer and measure small volumes of liquids, typically for immunological or serological testing. Graduated pipettes can transfer and measure a wider range of liquid volumes.

– Graduations: Serological pipettes usually have graduations from 0.1 mL to 1 mL. Graduated pipettes can have graduations from 0.1 mL up to 100 mL or more.

– Accuracy: Serological pipettes are more accurate for measuring small volumes, with tolerances around ±0.02 mL. Graduated pipettes are usually less accurate, with tolerances of ±0.1 mL or more.

– Tip: Serological pipettes have longer, narrower tips to facilitate dispensing drops and aspirating liquid. Graduated pipette tips are wider and suited for larger volumes.

– Disposability: Serological pipettes are usually plastic and disposable. Graduated pipettes can be glass or plastic and are often reusable.

– Color coding: Serological pipettes often use color coding to differentiate capacities. Graduated pipettes are not color coded.

– Design: Serological pipettes have graduations printed directly on the pipette. Graduated pipettes have separate bulbs for filling and graduations on the stem.

So in summary, serological pipettes are specialized for small volumes needed for serology tests, while graduated pipettes are more general purpose across a wider volume range.

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