CO-AF Carbon Monoxide Sensor

PERFORMANCE
Sensitivity          nA/ppm in 400ppm CO                  55 to 90
Response time   t90 (s) from zero to 400ppm CO       < 25
Zero current      ppm equivalent in zero air           -4 to +2
Resolution         RMS noise (ppm equivalent)           < 0.5
Range ppm       CO limit of performance warranty     5,000
Linearity            ppm error at full scale, linear at zero, 1000ppm CO  +15 to +25
Overgas limit     maximum ppm for stable response to gas pulse   10,000

LIFETIME
Zero drift           ppm equivalent change/year in lab air < 0.2
Sensitivity drift  % change/year in lab air, monthly test < 8
Operating life    months until 80% original signal (24 month warranted) > 24

ENVIRONMENTAL
Sensitivity at -20°C % (output at -20°C/output @ 20°C) at 400ppm CO 63 to 88
Sensitivity at 50°C  % (output at 50°C/output @ 20°C) at 400ppm CO  102 to 115
Zero at -20°C         ppm equivalent change from 20°C   < ± 3
Zero at 50°C          ppm equivalent change from 20°C   < ± 8

CROSS SENSITIVITY
Filter capacity       pm·hours H2S                    250,000
Filter capacity       ppm-hours NO2                    600,000
Filter capacity       ppm-hours NO                      20,000
Filter capacity       ppm-hours SO2                    300,000
H2S    sensitivity  % measured gas at 20ppm H2S             < 0.1
NO2   sensitivity  % measured gas at 10ppm NO2             < 0.1
Cl2     sensitivity  % measured gas at 10ppm Cl2               < 0.1
NO     sensitivity  % measured gas at 50ppm NO               < 5
SO2   sensitivity  % measured gas at 20ppm SO2             < 0.1
H2     sensitivity  % measured gas at 400ppm H2 at 20°C < 60
C2H4 sensitivity  % measured gas at 400ppm C2H4          < 25
NH     sensitivity  % measured gas at 20ppm NH3             < 0.1

KEY SPECIFICATIONS
Temperature range  °C                                      -30 to 50
Pressure range        kPa                                     80 to 120
Humidity range       % rh continuous                 15 to 90
Storage period        months at 3 to 20°C (stored in sealed pot)  6
Load resistor           Ω (recommended)              10 to 47
Weight                    g                                         < 6