Metering apparatus for liquids and method for metering liquids

A metering apparatus for liquids, with

• a base body (2),
• a pipette holder disposed on the base body (2) for holding at least one pipette point (6) in sealing connection with its upper opening to a passage opening (15) on the base body (2), and a displacement device (12) disposed in the base body (2) having a displacement chamber (13), a displacement member (14) movably disposed therein, and a communicating connection to the passage opening (15), or
• syringe holder disposed on the base body (2) for holding at least one syringe with a syringe cylinder in stationary relation to the base body, and with a syringe piston shiftable in the syringe cylinder and a coupler configured to be mechanically coupled to the syringe piston in the base body,
• a detachment device disposed on the base body (2) for detaching the pipette point (6) or syringe from the pipette holder, with a manually actuable actuation member (7.4) for actuating the detaching device without that the displacement member (14) or the coupler are moved,
• a sensor (16) disposed on the base body (2) for detecting an actuation of the detaching device or an occurred detachment of the pipette point or syringe,
• a controllable drive (20), which is operably connected to the displacement member (14) or the coupler,
• an input device for controlling the controllable drive (20),
• an electric control device, electrically connected to the controllable drive (20), the input device and the sensor (16) and the electric control means automatically configure the controllable drive (20) to dislocate the displacement member (14) or the coupler into a base position when the sensor (16) detects an actuation of the detachment device or the occurred detachment of the pipette point (16) or syringe.