Pipetting device and method
AssigneeTecan Trading AG
InventorsMichael Keller, Thomas Geiges
Life of this patent
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Abstract
Pipetting device for pipetting a liquid driven by a gaseous working medium, the pipetting device having at least one pipette connector adapted to attach a pipette at a connection opening at least one pressurizing and/or suctioning pressure source, a gas flow connection between said connection opening and at least one pressure source, a flow restriction defining at least a section of said gas flow connection, a first sensor configured to measure a quantity indicative of the temperature of the flow restriction. The invention is further directed to a gas flow connection element for a pipetting device and to a method of pipetting a liquid volume.
Claims20
Pipetting device (10) for pipetting a liquid driven by a gaseous working medium, the pipetting device comprising:
- at least one pipette connector (13) adapted to attach a pipette (21) at a connection opening (14),
- at least one pressurizing and/or suctioning pressure source (11, 11′, 11″),
- a gas flow connection (12) between said connection opening and said at least one pressurizing and/or suctioning pressure source (11, 11′, 11″),
- a flow restriction (15) defining at least a section of said gas flow connection,
- a first sensor (16) configured to measure a quantity indicative of the temperature of the flow restriction,
- a heat storage block (19), wherein the flow restriction (15) is formed by an inner wall of the heat storage block or wherein the flow restriction (15) is formed by a flow restriction element (15′) embedded in the heat storage block, and
- wherein said first sensor (16) is a temperature sensor thermally connected to said heat storage block.
Pipetting device (10) for pipetting a liquid driven by a gaseous working medium, the pipetting device comprising:
- at least one pipette connector (13) adapted to attach a pipette (21) at a connection opening (14),
- at least one pressurizing and/or suctioning pressure source (11, 11′, 11″),
- a gas flow connection (12) between said connection opening and said at least one pressurizing and/or suctioning pressure source (11, 11′, 11″),
- a flow restriction (15) defining at least a section of said gas flow connection,
- a first sensor (16) configured to measure a quantity indicative of the temperature of the flow restriction,
- a heat storage block (19), wherein the flow restriction (15) is formed by a flow restriction element (15′) embedded in the heat storage block,
- wherein said first sensor (16) is a temperature sensor thermally connected to said heat storage block, and wherein a wall of said flow restriction element (15′) consists of a first material having a first specific thermal conductivity, wherein said heat storage block (19) consists of a second material having a second specific thermal conductivity, and wherein said second specific thermal conductivity is higher than said first specific thermal conductivity.
Pipetting device (10) for pipetting a liquid driven by a gaseous working medium, the pipetting device comprising:
- at least one pipette connector (13) adapted to attach a pipette (21) at a connection opening (14),
- at least one pressurizing and/or suctioning pressure source (11, 11′, 11″),
- a gas flow connection (12) between said connection opening and said at least one pressurizing and/or suctioning pressure source (11, 11′, 11″),
- a flow restriction (15) defining at least a section of said gas flow connection,
- a first sensor (16) configured to measure a quantity indicative of the temperature of the flow restriction,
- a heat storage block (19), wherein the flow restriction (15) is formed by an inner wall of the heat storage block, the flow restriction (15) being formed as a through hole in the heat storage block (19), the through hole forming three separate sections, an inlet section, a middle section and an outlet section, the middle section of the through hole being narrower than the inlet section and the outlet section thereof, and
- wherein said first sensor (16) is a temperature sensor thermally connected to said heat storage block.
Dependencies are inferred from the claim text.