Patent ID: 7867375

Claim:
A method for detecting the presence or absence of a gas bubble in an aqueous liquid to be measured, comprising: providing a sensor positioned within a measuring chamber, wherein said sensor is configured to determine the concentration of a gaseous component dissolved in said liquid to be measured, said sensor comprising a sensitive region; setting a gas partial pressure at the sensor to a predetermined value that differs from an expected value of the gas partial pressure of the gaseous component of said liquid to be measured, wherein a time to change from the predetermined value to a gas partial pressure value representative of a bubble-free sample of the liquid to be measured, is known; exposing said sensor to said liquid to be measured; resting said liquid to be measured until standstill is attained; recording a signal from said sensor as a function of time until said signal becomes constant; and detecting the presence or absence of a gas bubble in said liquid, from a comparison of the variation of said signal over time to said known time to change from said predetermined value to the gas partial pressure value representative of a bubble-free sample.