Pipette - Positive Displacement Pipette

Positive Displacement Pipette

These are similar to air displacement pipettes, but are less commonly used and are used to avoid contamination and for volatile or viscous substances at small volumes, such as DNA. The major difference is that the disposable tip is a microsyringe (plastic), composed of a plunger which directly displaces the liquid.

  • Positive displacement pipette

  • The chuck which will be used to move the plunger

  • An early pipette

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