AMPEROMETRIC SENSOR FOR MEASURING FREE CHLORINE WITH REFERENCE ELECTRODE HAVING A GOLD ELECTRODE SURFACE COMPOSED OF A STRING OF ELECTRICALLY CONNECTED, SPACED APART SURFACE PARTS
The present disclosure relates to an amperometric sensor for measuring free chlorine, which sensor comprises: an elongate body with a tip, wherein the circumferential surface of the body constitutes a counter electrode; a reference electrode having a silver/silverchloride electrode surface arranged on the tip of the elongate body; and a working electrode having a gold electrode surface arranged on the tip of the elongate body wherein the gold electrode surface is composed out of a string of electrically connected, spaced apart surface parts.
1 . Amperometric sensor for measuring free chlorine, which sensor comprises:
an elongate body with a tip, wherein a circumferential surface of the body constitutes a counter electrode;
a reference electrode having a gold electrode surface arranged on the tip of the elongate body; and
a working electrode having a silver/silverchloride electrode surface arranged on the tip of the elongate body;
wherein
the gold electrode surface is composed out of a string of electrically connected, spaced apart surface parts.
2 . Amperometric sensor according to claim 1 , wherein the surface parts are identically shaped and dimensioned.
3 . Amperometric sensor according to claim 1 , wherein the gold electrode surface is provided as a layer arranged on a substrate by wafer production techniques.
4 . Amperometric sensor according to claim 1 , wherein the counter electrode has a titanium electrode surface.
5 . Amperometric sensor according to claim 1 , wherein the reference electrode is composed out of a sintered Ag/AgCl powder.
6 . Combination of an amperometric sensor according to claim 1 and a potentiostat connected to the counter electrode, the working electrode and the reference electrode for maintaining the potential of the working electrode at a constant level with respect to the reference electrode by adjusting the current at the counter electrode.
7 . Combination according to claim 6 , wherein the potentiostat comprises a control feature for maintaining the potential of the working electrode at a constant level with respect to the reference electrode, which control feature has a compensating feature, which measures the resistance between electrode surfaces of at least the working electrode and the reference electrode and compensate for the measured resistance.
8 . Combination according to claim 6 , wherein the potentiostat further comprises a signal generator for adjusting the constant level according to a predefined signal pattern.
9 . Amperometric sensor according to claim 2 , wherein the surface parts are rectangular.
10 . Amperometric sensor according to claim 3 , wherein the gold electrode surface is provided as the layer arranged on the substrate by lithographic production techniques.