Patent ID: 8028592

Claim:
An electronic metering apparatus for metering liquids the apparatus having a longitudinal, handleable housing ( 2 ); a drive ( 7 ), arranged in the housing ( 2 ), with an electric motor ( 8 ); at least one displacer device ( 9 , 10 ), connected to the housing ( 2 ), with a displacer element ( 10 ), which is connected to the drive ( 7 ); at least one holding device ( 5 ) on the bottom end of the housing ( 2 ) for holding a metering device selected from the group consisting of a pipette point ( 6 ) and a syringe; at least one electric operational control ( 18 to 21 ) connected to the housing ( 2 ); at least one electric information device ( 25 , 26 ) connected to the housing ( 2 ); an electric control unit ( 22 ) arranged in the housing ( 2 ), which is connected to the electric motor ( 8 ), the electric operational control ( 18 to 21 ) and the electric information device ( 25 , 26 ), and which controls the information device ( 25 , 26 ) depending on the position and/or previous changes of the position of the displacer element ( 10 ), in order to put out an information concerning the next reasonable dislocation of the displacer element ( 10 ); and an electric power supply ( 23 ); wherein the electric operation control ( 18 to 21 ) comprises a pair of electric control keys ( 20 , 21 ) for controlling the dislocation of the displacer element ( 10 ), wherein the two control keys ( 20 , 21 ) control the dislocation of the displacer element ( 10 ) in different directions.