Integrated Electrochemical Sulfur Dioxide Sensors

Integrated electrochemical sensors are being developed for use in measuring concentrations of sulfur dioxide in gas mixtures. These sensors are based on the electrochemical oxidation of SO2 and measurement of the resulting electric current. Conceived for sensing SO2 in volcanic gases, sensors of this type could also be used to monitor SO2 in ambient air and in gases emitted during such industrial operations as metallurgical processing, refining of petroleum, and burning of coal.