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Multi-gas microsensor assembly

  • US 8,366,894 B2
  • Filed: 02/22/2010
  • Issued: 02/05/2013
  • Est. Priority Date: 02/20/2009
  • Status: Expired due to Fees
First Claim
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1. 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.

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