A specific level of air is remaining amongst the piston plus the liquid in air displacement pipettes. In positive displacement pipetting, the piston makes direct Speak to with the fluid. Panel B describes beneficial-displacement pipettes: the disposable piston is part in the capillary tip and there isn't any air cushion https://pipette-tips01110.blogrelation.com/35408533/the-greatest-guide-to-pipette-types