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Ozone Gas Sensor + Nitrogen Dioxide Sensor (O3 Sensor + NO2 Sensor) OX-B431

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ProductName: Ozone Gas Sensor + Nitrogen Dioxide Sensor (O3 Sensor + NO2 Sensor) OX-B431
ProductModel: OX-B431
ProductManufacturer: Alphasense
ProductSimpleIntroduce
Ozone Gas sensor + Nitrogen Dioxide Sensor (O3 Sensor + NO2 Sensor) OX-B431


Ozone Gas Sensor + Nitrogen Dioxide Sensor (O3 Sensor + NO2 Sensor) OX-B431  detail

OX-B431 Oxidising Gas sensor Ozone + Nitrogen Dioxide 4-Electrode



Specification OX-B431 O3 Sensor 
OX-B431 O3 Sensor PERFORMANCE
Sensitivity  nA/ppm at 1ppm O3 -225 to -550
Response time  t90 (s) from zero to 1ppm O3 < 45
Zero current  nA in zero air at 20℃ -50 to 70
Noise*  ±2 standard deviations (ppb equivalent) 15
Range  ppm O3 limit of performance warranty 20
Linearity  ppm error at full scale, linear at zero and 20ppm O3 < ±0.5
Overgas limit  maximum ppm for stable response to gas pulse 50
* Tested with Alphasense AFE low noise circuit



OX-B431 O3 Sensor 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



OX-B431 O3 Sensor ENVIRONMENTAL
Sensitivity @ -20℃ (% output @ -20℃/output @ 20℃) @ 2ppm O3 70 to 90
Sensitivity @ 40℃  (% output @ 40℃/output @ 20℃) @ 2ppm O3 95 to 125
Zero @ -20℃ nA 0 to 25
Zero @ 40℃ nA 5 to 100



OX-B431 O3 Sensor CROSS SENSITIVITY
H2S sensitivity % measured gas @ 5ppm H2S < 170
NO sensitivity % measured gas @ 5ppm NO < 5
Cl2 sensitivity % measured gas @ 5ppm Cl2 < 90
SO2 sensitivity % measured gas @ 5ppm SO2 < -7
CO sensitivity % measured gas @ 5ppm CO < 0.1
C2H4 sensitivity % measured gas @ 100ppm C2H4 < 0.1
NH3 sensitivity % measured gas @ 20ppm NH3 < 0.1
H2 sensitivity % measured gas @ 100ppm H2 < 0.1
CO2 sensitivity % measured gas @ 5% Vol CO2 0.1
Halothane sensitivity % measured gas @ 100ppm Halothane < 0.1



OX-B431 O3 Sensor KEY SPECIFICATIONS
Temperature range -30 to 40
Pressure range kPa 80 to 120
Humidity range % rh continuous 15 to 85
Storage period months @ 3 to 20℃ (stored in sealed pot) 6
Load resistor Ω (AFE circuit recommended) 33 to 100
Weight g < 6


Specification NO2 Sensor


OX-B431 NO2 Sensor PERFORMANCE
Sensitivity to NO2 nA/ppm at 2ppm NO2 -250 to -650
Response time t90 (s) from zero to 2ppm NO2  < 35
Zero current nA in zero air at 20℃  -50 to +70
Noise* ±2 standard deviations (ppb equivalent) 15
Range ppm NO2 limit of performance warranty 20
Linearity ppm error at full scale, linear at zero and 20ppm NO2 < ±0.5
Overgas limit
maximum ppm for stable response to gas pulse 50
* Tested with Alphasense AFE low noise circuit



OX-B431 NO2 Sensor 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



OX-B431 NO2 Sensor ENVIRONMENTAL
Sensitivity @ -20℃ (% output @ -20℃/output @ 20℃) @ 2ppm NO2 70 to 90
Sensitivity @ 40℃ (% output @ 50℃/output @ 20℃) @ 2ppm NO2 95 to 110
Zero @ -20℃ nA  0 to 25
Zero @ 40℃ nA  5 to 50



OX-B431 NO2 Sensor CROSS SENSITIVITY 
H2S sensitivity % measured gas @ 5ppm H2S < 170
NO sensitivity % measured gas @ 5ppm NO < 5
Cl2 sensitivity % measured gas @ 5ppm Cl2 < 90
SO2 sensitivity % measured gas @ 5ppm SO2 < -7
CO sensitivity % measured gas @ 5ppm CO < 0.1
C2H4 sensitivity % measured gas @ 100ppm C2H4 < 0.1
NH3 sensitivity % measured gas @ 20ppm NH3 < 0.1
H2 sensitivity % measured gas @ 100ppm H2 < 0.1
CO2 sensitivity % measured gas @ 5% Vol CO2 0.1
Halothane sensitivity % measured gas @ 100ppm Halothane < 0.1



OX-B431 NO2 Sensor KEY SPECIFICATIONS
Temperature range -30 to 40
Pressure range kPa 80 to 120
Humidity range % rh continuous 15 to 85
Weight g < 6
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