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Positive Displacement

Positive Displacement Pipettes

Positive Displacement pipetting refers to specialised pipettes and associated tips (capillary pistons) whereby the piston is not an internal part of the pipette but rather sits within the tip in direct contact with the sample liquid. As there is no air pocket to evaporate into, this system is ideal for volatile liquids. Additionally the disposable capillary pistons can be discarded providing a 100% effective barrier against cross-contamination.