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

Sensitivity: -225 to -550 nA/ppm at 1ppm O3
Sensitivity: -250 to -650 nA/ppm at 2ppm NO2
Response time: < 45 t90 (s) from zero to 1ppm O3
Range: 20 ppm O3 limit of performance warranty
Temperature range: -30 to 40 ℃
Pressure range: 80 to 120 kPa
Humidity range: 15 to 85 % rh continuous

  • Model Number: OX-B431
  • Data Sheet: Date Sheet File
Quantity:
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  • OX-B431 Oxidising Gas Sensor Ozone + Nitrogen Dioxide 4-Electrode
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Product Specification

OX-B431 Oxidising Gas Sensor

Ozone + Nitrogen Dioxide

4-Electrode


Specification O3  Sensing

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

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℃ (% 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

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

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  Sensing
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

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℃ (% 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

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

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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