Patent ID: 8366894

Claim:
A multi-gas microsensor assembly comprising: (a) a sensor module, said sensor module comprising (i) a sensor, said sensor comprising (A) a non-conductive solid substrate, (B) a plurality of sensing electrodes positioned on said non-conductive solid substrate, (C) a reference electrode positioned on said non-conductive solid substrate, (D) a counter electrode positioned on said non-conductive solid substrate, (E) wherein at least two of said sensing electrodes share said reference electrode and said counter electrode, (F) a solid polymer electrolyte ion-exchange membrane having a first side in intimate contact with each of said sensing electrodes, said reference electrode, and said counter electrode, said solid polymer electrolyte ion-exchange membrane having at least one gas diffusion opening aligned with each of said sensing electrodes, (G) wherein at least a portion of said reference electrode is positioned between the at least two sensing electrodes sharing said reference electrode and wherein at least a portion of said counter electrode is positioned between the at least two sensing electrodes sharing said counter electrode, and (ii) a sensor housing, the sensor housing having a cavity, the sensor being disposed within the cavity of the sensor housing; and (b) an electronics module, said electronics module comprising (i) an electronics housing, the electronics housing having a cavity, (ii) electronics disposed within the cavity of the electronics housing, said electronics including a multi-potentiostat, the multi-potentiostat being coupled to the sensor so as to simultaneously and independently control at least two of the sensing electrodes; (c) wherein one of the electronics module and the sensor module is positioned over the other.