Patent ID: 7379832
Filing Date: 2008-05-27
Classification: B01L,G01F,G01N,Y10T

Abstract:
1. Multi-channel metering apparatus with automatic calibration with several dispensing channels ( 1 ) respectively with a nozzle ( 2 ) and a micro-valve ( 4 ), whereby a plurality of micro-valves ( 4 ) each exhibit a discharge opening ( 3 ), which is respectively connected with one of a plurality of nozzles ( 2 ) and at least one supply opening ( 5 or 6 ) is respectively present on the micro-valves ( 4 ), which are respectively connected with an outlet of a distributor ( 8 , 13 or 15 ), the inlet of which is indirectly connected via a flow sensor ( 10 ) with a vessel ( 9 , 14 or 17 ) filled with a fluid and paths between the inlet and a plurality of outlets of the distributor exhibit the same fluidic resistance as well as a pressure source ( 19 ) to produce overpressure in the vessel ( 9 , 14 or 17 ) and a control unit ( 16 ) connected with the flow sensor ( 10 ) and the micros-valves ( 4 ) and generates the individual control signals for the micro-valves ( 4 ) from the measured values received from the flow sensor ( 10 ).