Patent ID: 7108774

Claim:
An electrochemical, polarographic/galvanostatic sensor for analyzing a liquid, in which sensor there is a measurement cell, through which the liquid is led and in which there are several working electrodes of different material, reference-electrodes, current-supplying counter-electrodes, and pre-amplifiers to amplify weak measurement signals, characterized in that the electrodes are arranged into 4–15 electrode series, each series including at least one of the working electrodes, one of the reference electrodes, one of the counter-electrodes, and a shared fourth electrode which is a common bias-electrode completing each electrode series, each series including one of the pre-amplifiers located proximate the electrodes of the series in a circuit card, and the electrodes being attached to an electrode cover in such a way that an end of the electrodes extends into a channel and the opposite end is connected directly to the circuit card.