Amperometric measuring device comprising an electrochemical sensor

摘要

P This amperometric sensor comprises a sensor (21) having a photolithographic planar structure and a circuit (22) for measuring the intensity of the electrochemical current generated for the sensor (21). The planar structure includes an insulating substrate (23-25), a working electrode (29), a counter electrode (30), and a reference electrode (31). A diffusion membrane (32) is deposited on the working electrode (29). Connections (26) connect the electrodes (29, 30, 31) to the measuring circuit (22); the active conductive part of the working electrode (29) situated on the surface of the substrate (23) is entirely covered by the diffusion membrane (32) which extends beyond this electrode (29) throughout its peripheral zone, and is fully exposed so that during operation of the device (20), it is in contact with the fluid to be analyzed over its entire surface. BR/ Application: measuring the content of chlorine in drinking water. / P