Roche Molecular Systems, Inc.

Roche Diagnostics Gmbh

F. Hoffmann-la Roche Ag

Philipp Kull

Daniel Ott

Joerg Burmester

Markus Thiel

Hans-Rudolf Bachmann

Jörg Burmester

A method of gravimetric volume determination is described in which a load cell can be calibrated either outside of an analytic analyzer for gravimetric calibration of the analyzer, or in a fully automated manner inside the analyzer.

Method for gravimetric volume determination

A device for the gravimetric volume determination of liquid volumes. The device comprises a housing () having the shape and dimensions of a standard rack used in a clinical diagnostic analyzer system for holding sample or reagent containers, and the following components contained in housing (): a load cell () for gravimetric volume determination, a weighing container () for receiving a liquid to be weighed with said load cell (), a windbreak () which shields said weighing container () from air flow, an evaporation trap () which prevents evaporation of liquid loaded into said weighing container (), a temperature sensor (), an air-pressure sensor () and a humidity sensor () for sensing temperature, air pressure and humidity respectively at predetermined points within said housing (), and an electronic processing unit for processing electrical output signals delivered by said load cell () and by said sensors ().

Device and method for the gravimetric determination of liquid volumes and analyzer system comprising such a device

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Adliswil, Switzerland

Philipp Kull