Patent ID: 6652721
Filing Date: 2003-11-25
Classification: G01N

Abstract:
A sensor for measuring O2 concentrations in liquids, the sensor comprising:a working electrode; a counterelectrode; a reference electrode, said working electrode and said counterelectrode are in contact with the liquid; a potentiostat regulating a potential between said working electrode and said counterelectrode; a diaphragm, said reference electrode being separated from said liquid by said diaphragm, said reference electrode measuring a polarization voltage effectively acting at said working electrode and being connected to said potentiostat, said reference electrode, said working electrode and said counterelectrode being arranged coaxially to one another with said working electrode and said counterelectrode being arranged around said reference electrode; contacts, for a connection of said working electrode, said counterelectrode and said reference electrode arranged at one axial end of the sensor; a coaxial opening through which the liquid can flow arranged at an axial end of said axis of said sensor opposite said contacts; a radial opening through which the liquid can flow arranged in a radially outermost one of said working electrode, said counterelectrode and said reference electrode.