MEASUREMENT Operating Principle: 3-electrode electrochemical Nominal Range: 0-2000 ppm SO2 Maximum Overload: 5000 ppm SO2 Filter: To remove effects of H2S and HCl Filter Life: >200,000 ppm hours (1000 ppm H2S @ 500 ml/min) Sensitivity: 0.10 0.02 A/ppm Response Time (T90): < 40 seconds Baseline Offset (clean air): 2 ppm equivalent Maximum Zero Shift (+20C to +40C): 5 ppm equivalent Resolution (When using recommended electronics): 1 ppm Repeatability: 1% of signal Linearity: Linear ELECTRICAL Recommended Load Resistor: 10 Bias Voltage: Not Required MECHANICAL Weight: 10 g nominal Orientation: Any ENVIRONMENTAL Operating Temperature Range: -20C to +50C Recommended Storage Temp: 0C to 20C Pressure Coefficient: Approx. 0.08% signal / mbar Operating Pressure Range: Atmospheric 10% Operating Humidity Range: 15 - 90% RH non-condensing LIFETIME Long Term Sensitivity Drift: <2% signal loss per month Expected Operating Life: Two years in air

• Measurement range 0-2000 ppm
• Response Time < 40 seconds (T90)
• Target Gas Sulfur Dioxide