ETO-B1 Ethylene Oxide Sensor

PERFORMANCE 
Sensitivity            nA/ppm in 20ppm EtO                                   2000 to 3200
Response time     t90 (s) from zero to 20ppm EtO                                < 200
Zero current        ppm equivalent in zero air                           < -0.6 to +0.75
Resolution           RMS noise (ppm equivalent)                                       < 0.1
Range                 ppm EtO limit of performance warranty                         100
Linearity              ppm error at full scale, linear at zero, 40ppm EtO     5 to 10
Overgas              limit maximum ppm for stable response to gas pulse    500

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

ENVIRONMENTAL
Sensitivity at -20℃ % (output at -20℃/output at 20℃) at 40ppm EtO  30 to 50
Sensitivity at 50℃  % (output at 50℃/output at 20℃) at 40ppm EtO   115 to 145
Zero at -20℃         ppm equivalent change from 20℃                             < ±0.5
Zero at 50℃          ppm equivalent change from 20℃                            < +2 to +5

CROSS SENSITIVITY
H2S     sensitivity     % measured gas at 20ppm H2S            < 200
NO2    sensitivity      % measured gas at 10ppm NO2           < 35
Cl2      sensitivity      % measured gas at 10ppm Cl2             < -3
NO      sensitivity      % measured gas at 50ppm NO             < 80
SO2    sensitivity      % measured gas at 20ppm SO2           < 40
CO      sensitivity      % measured gas at 40ppm CO             < 25
H2      sensitivity      % measured gas at 400ppm H2            < 0.5
C2H4  sensitivity      % measured gas at 80ppm C2H4          < 100
NH3    sensitivity      % measured gas at 25ppm NH3            < 0.1
HCHO sensitivity      % measured gas at 4ppm HCHO            90
CO2   sensitivity       % measured gas at 5% volume CO2     < 0.1
       
KEY SPECIFICATIONS 

Temperature range  ℃                                                                        -30 to 50

Pressure range         kPa                                                                      80 to 120

Humidity range       % rh continuous                                                    15 to 90