high sensitive H2S CO NO NO2 SO2 gas Sensors for Air Quality Detection A4 Series

high sensitive H2S CO NO NO2 SO2 gas Sensors for Air Quality Detection A4 Series      SPECIFICATIONS Sensitivity nA/ppm at 2ppm H2S 1200 to 1650 Response time t90 (s) from zero to 2ppm H2S < 45 Zero current nA in zero air at 20°C -170 to 0 Noise* ±2 standard deviations (ppb equivalent) 5 Range ppm H2S limit of performance warranty 50 Linearity ppb error at full scale, linear at zero and 10ppm H2S < ± 0.5 Overgas limit maximum ppm for stable response to gas pulse 100 * Tested with Alphasense AFE low noise circuit LIFETIME Zero drift ppb equivalent change/year in lab air < ±100 Sensitivity drift % change/year in lab air, monthly test < 20 Operating life months until 50% original signal (24 month warranted) 24 ENVIRONMENTAL Sensitivity @ -20°C (% output @ -20°C/output @ 20°C) @ 2ppm H2S 80 to 92 Sensitivity @ 50°C (% output @ 50°C/output @ 20°C) @ 2ppm H2S 100 to 110 Zero @ -20°C nA change from 20°C 30 to 50 Zero @ 50°C nA change from 20°C 90 to 110 CROSS SENSITIVITY  NO2 sensitivity % measured gas @ 5ppm NO2 < -20 Cl2 sensitivity % measured gas @ 5ppm Cl2 < -8 NO sensitivity % measured gas @ 5ppm NO < 3 SO2 sensitivity % measured gas @ 5ppm SO2 < 15 CO sensitivity % measured gas @ 5ppm CO < 1 H2 sensitivity % measured gas @ 100ppm H2 < 0.5 C2H4 sensitivity % measured gas @ 100ppm C2H4 < 0.5 NH3 sensitivity % measured gas @ 5ppm NH3 < 0.1 CO2 sensitivity % measured gas @ 5% CO2 < 0.1 KEY SPECIFICATIONS  Temperature range °C -30 to 50 Pressure range kPa 80 to 120 Humidity range % rh 15 to 90 Storage period months @ 3 to 20°C (stored in sealed pot) 6 Load resistor Ω (AFE circuit is recommended) 33 to 100 Weight g < 6
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