How does a positive displacement pipette work

Here's what you should know.How accurate are eppendorf pipettes?The store will not work correctly in the case when cookies are disabled.How positive displacement pumps work.The absence of the air cushion offers optimal accuracy of.

A disposable piston moves within the tip, making direct contact with the liquid.In positive displacement pipetting, the piston is in direct contact with the liquid.Unlike air displacement pipettes, the piston is contained in the pipette tip instead of the pipette.A disposable piston, which moves within a plastic capillary, makes direct contact with the liquid.When the push button is pressed on the pipette, the piston integrated in the lower part of the pipette moves the liquid under the action of an air cushion (called dead volume.

As described in figure 1, the complete pipetting technique consists in only four steps:Once the fluid is in the cavity.