| abstract |
According to the inventionnprovided a sensor for determining a concentration of an inna substance containing a liquid matrix,nwith a measuring chamber (2), a transmitter (3) for emitting opticalnRadiation (6) in the measuring chamber and a receivern(4) for receiving optical through the measuring chambernRadiation (6), wherein the measuring chamber for introduction into thenMatrix formed with a specific liquid (5)nfilled and its wall (12, 13) at least in sectionsnis permeable to the substance and that anControl and evaluation circuit (7) is provided, which with the transmittern(3) for its control and the receiver (4) for readingnfrom receiver signals and that from the receiver signalna measure of the concentration of the substance in thenMatrix determined. |