Roche Diagnostics Operations, Inc.

Egon Landschuetzer

Wolf-Dietrich Steinboeck

Robert Gruebler

A method of detecting a gas bubble in a measuring chamber filled with a liquid. The electrical conductivity of the liquid or a variable derived therefrom is measured in the measuring chamber at a first pressure value p, and a first measured value Sis detected. The pressure in the measuring chamber is changed, the electrical conductivity of the liquid or a variable depending thereon is measured in the measuring chamber at at least a second pressure value p, and a second measured value Sis detected. The presence or lack of presence of at least one gas bubble in the liquid is detected by comparing the first measured value Sto the second measured value S.

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Graz, Austria

Egon Landschuetzer