A selected degree of air is still left in between the piston along with the liquid in air displacement pipettes. In positive displacement pipetting, the piston makes direct Call with the fluid. It is also referred to as bulby pipette or belly pipette. It is commonly used in analytical chemistry https://typesofpipettecalibration89009.mpeblog.com/52892234/rumored-buzz-on-different-kinds-of-pipette