Patent ID: 7972575

Claim:
A two-phase electronic pipette comprising: a cylinder having an open end to allow a liquid to be introduced into and discharged therefrom; a piston which is moveably positionable within the cylinder at a basic position, an upper position above the basic position, and a lower position below the basic position; an electronic motor operably connected to the piston to cause (1) a primary movement of the piston within the cylinder from the basic position thereof away from the open end of the cylinder by a first distance to the upper position thereof so as to define a dosage volume of the liquid to be discharged from the pipette through the open end of the cylinder, and (2) a secondary movement of the piston within the cylinder from the basic position thereof towards the open end of the cylinder by a second distance to the lower position thereof; and a control system having a user interface to allow manual user inputs for setting operational adjustments of the pipette, wherein the control system issues a command to the electronic motor in response to receiving a manual user input to adjustably change the second distance of the secondary movement of the piston between the basic and lower positions thereof.