NO2 Gas Sensor Nitrogen Dioxide Sensor

PERFORMANCE
Sensitivity nA/ppm at 2ppm NO2 -175 to -450
Response time t90 (s) from zero to 2ppm NO2 < 60
Zero current nA in zero air at 20°C -50 to +70
Noise* ±2 standard deviations (ppb equivalent) 15
Range ppm NO2 limit of performance warranty 20
Linearity ppb error at full scale, linear at zero and 5ppm NO2 < ±0.5
Overgas limit maximum ppm for stable response to gas pulse 50
* Tested with Alphasense ISB low noise circuit

LIFETIME

Zero drift ppb equivalent change/year in lab air 0 to 20
Sensitivity drift % change/year in lab air, monthly test -20 to -40
Operating life months until 50% original signal (24 month warranted) > 24

ENVIRONMENTAL
Sensitivity @ -20°C (% output @ -20°C/output @ 20°C) @ 2ppm NO2 60 to 80
Sensitivity @ 40°C (% output @ 40°C/output @ 20°C) @ 2ppm NO2 95 to 115
Zero @ -20°C nA 0 to 25

Zero @ 40°C nA -10 to 50

KEY SPECIFICATIONS
Temperature range °C -30 to 40
Pressure range kPa 80 to 120
Humidity range % rh continuous 15 to 85
Storage period months @ 3 to 20°C (stored in sealed pot) 6
Load resistor W (ISB circuit is recommended) 33 to 100
Weight g < 13