METHOD AND DEVICE FOR DETECTING CONTACT OF A PIPETTE TIP WITH A LIQUID AS WELL AS A LABORATORY SYSTEM WITH SUCH A DEVICE

METHOD AND DEVICE FOR DETECTING CONTACT OF A PIPETTE TIP WITH A LIQUID AS WELL AS A LABORATORY SYSTEM WITH SUCH A DEVICE

The present invention pertains to a method for detecting contact of a pipette tip (4) with a surface (7) of a liquid (6) in a pipetting device (1). The method comprises moving (m) the pipette tip (4) in direction of the surface (7) of the liquid (6), thereby measuring an absolute capacitance (C) bet...

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Hauptverfasser: POPOVIC, Nemanja, DIETERICH, Pascal, FREI, Luca, HARSCH, Sabrina, DÖRNER, Benjamin
Format: Patent
Sprache:eng ; fre ; ger
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INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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creator POPOVIC, Nemanja
DIETERICH, Pascal
FREI, Luca
HARSCH, Sabrina
DÖRNER, Benjamin
description The present invention pertains to a method for detecting contact of a pipette tip (4) with a surface (7) of a liquid (6) in a pipetting device (1). The method comprises moving (m) the pipette tip (4) in direction of the surface (7) of the liquid (6), thereby measuring an absolute capacitance (C) between the pipette tip (4) and a reference potential (GND) and generating a sampled output signal (sout[n]). Furthermore, a predicted momentary sample value of the output signal (sout[n]) is generated based on a plurality of past sample values of the output signal (sout[n]). A contact signal (DL) indicative of the pipette tip (4) being in contact with the surface (7) of the liquid (6) is generated based on comparing a momentary sample value of the output signal (sout[n]) with the predicted momentary sample value of the output signal (sout[n]). Moreover, a corresponding pipetting device (1) capable of performing the method as well as a laboratory system, in particular an automated liquid processing system, with one or more such pipetting devices (1) are proposed.
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subjects INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
title METHOD AND DEVICE FOR DETECTING CONTACT OF A PIPETTE TIP WITH A LIQUID AS WELL AS A LABORATORY SYSTEM WITH SUCH A DEVICE
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