×

Method for detecting or monitoring sulfur dioxide with an electrochemical sensor

  • US 6,623,620 B2
  • Filed: 12/17/1999
  • Issued: 09/23/2003
  • Est. Priority Date: 11/22/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of detecting or monitoring sulfur dioxide in an emission gas comprisingcontacting the emission gas with an electrochemical micro-sensor device comprising a substrate supporting an arrangement of a working electrode, a reference electrode, and a counter electrode, wherein a first portion of the electrodes is covered with an insulator, and a second portion of the electrodes is covered with an electrolyte, and wherein the electrodes and the insulator are applied to the substrate using a thick film technique;

  • maintaining the micro-sensor device at a constant temperature higher than the temperature of the emission gas contacting the micro-sensor device;

    measuring the current output of the micro-sensor device;

    determining if the current output indicates the presence of sulfur dioxide; and

    generating a signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×