Street Address: 16 Floor, Building #3, Zhongke Mansion, Gaoxin South 1st Rd, Hi-Tech Park, Nanshan
City: Shenzhen
Province: Guangdong
Country/Region: China
other
SO2-B4 Sulfur Dioxide Sensor 4-Electrode
PERFORMANCE Sensitivity nA/ppm at 2ppm SO2 275 to 475 Response time t90 (s) from zero to 2ppm SO2 < 30 Zero current nA in zero air at 20 -80 to +80 Noise* ±2 standard deviations (ppb equivalent) 5 Range ppm limit of performance warranty 100 Linearity ppb error at 100ppm SO2 , linear at zero and 10ppm SO2 0 to -2 Overgas limit maximum ppm for stable response to gas pulse 200 * Tested with Alphasense ISB low noise circuit
LIFETIME Zero drift ppb equivalent change/year in lab air < ±20 Sensitivity drift % change/year in lab air, monthly test < ±15 Operating life months until 50% original signal (24 month warranted) > 36
ENVIRONMENTAL Sensitivity @ -20 (% output @ -20/output @ 20) @ 2ppm SO2 70 to 82 Sensitivity @ 50 (% output @ 50/output @ 20) @ 2ppm SO2 95 to 110 Zero @ -20 nA change from 20 0 to -10 Zero @ 50 nA change from 20 10 to 30
CROSS SENSITIVITY Filter capacity ppm·hrs 450 H2S sensitivity % measured gas @ 5ppm H2S < 2 NO2 sensitivity % measured gas @ 5ppm NO2 < -160 Cl2 sensitivity % measured gas @ 5ppm Cl2 < -40 NO sensitivity % measured gas @ 5ppm NO < -2 CO sensitivity % measured gas @ 5ppm CO < 2 H2 sensitivity % measured gas @ 100ppm H2 < 0.5 C2H4 sensitivity % measured gas @ 100ppm C2H4 < 1 NH3 sensitivity % measured gas @ 20ppm 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 continuous (see note below) 15 to 90 Storage period months @ 3 to 20°C (stored in sealed pot) 6 Load Resistor (ISB circuit is recommended) 33 to 100 Weight g < 13