G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 35/10 (2006.01) G01N 1/00 (2006.01) G01N 35/04 (2006.01) G01N 35/06 (1990.01)
Patent
CA 2088967
Abstract A pipetting device containing the following components: a pipetting needle connected to a metering device for transferring a volume of liquid from a primary vessel to a secondary vessel, the primary vessel and the secondary vessel being disposed on the same or different vessel carrier units, and each vessel having a given clearly defined position relative to the vessel carrier unit carrying it, a device for controlled conveyance of the pipetting needle in three directions perpendicular to one another, and a control device for controlling the metering device and the conveying device. To determine the coordinates of the pipetting positions for a given position of each vessel carrier unit the following additional components are provided in the pipetting device: for each vessel carrier unit atleast one reference member, which is part of the vessel carrier unit or is directly and permanently connected thereto, and which has flat surfaces which are accessible to sensing with the pipetting needle, control means contained in the control device for causing the pipetting needle to be conveyed to each of the surfaces of the at least one reference member, such surfaces each deterrnining a reference point, and means for determining contact between the pipetting needle and each of the surfaces of the at least one reference member, said surfaces each determining a reference point.
F. Hoffmann-La Roche Ag
Gowling Lafleur Henderson Llp
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