4-Electrode Hydrogen Sulfide Sensor - H2S-B4

 

H2S-B4 Hydrogen Sulfide Sensor 4-Electrode

 

 

4-Electrode Hydrogen Sulfide Sensor

 

Product Specification

 

H2S-B4 Hydrogen Sulfide Sensor 4-Electrode

 

 

 

PERFORMANCE
Sensitivity          nA/ppm at 2ppm H2S                                     1450 to 2050
Response time        t90 (s) from zero to 2ppm H2S                          < 45
Zero current         nA in zero air at 20℃                                 -250 to 0
Noise*               ±2 standard deviations (ppb equivalent)               1
Range                ppm H2S limit of performance warranty                  100
Linearity            ppb error at full scale, linear at zero and 40ppm H2S  < ±4
Overgas limit        maximum ppm for stable response to gas pulse           200
* Tested with Alphasense ISB low noise circuit

 

 

 

LIFETIME
Zero drift           ppb equivalent change/year in lab air                  < ±100
Sensitivity          drift % change/year in lab air, monthly test           < 20
Operating life       months until 50% original signal (24 month warranted)  > 24

 

 

 

ENVIRONMENTAL
Sensitivity @ -20℃  (% output @ -20°C/output @ 20℃) @ 2ppm H2S           77 to 90
Sensitivity @ 50℃   (% output @ 50°C/output @ 20℃) @ 2ppm H2S            100 to 110
Zero @ -20℃         nA change from 20℃ 50 to 60
Zero @ 50℃          nA change from 20℃ -120 to -160

 

 

 

CROSS SENSITIVITY
NO2                  sensitivity % measured gas @ 5ppm NO2                  < -10
Cl2                  sensitivity % measured gas @ 5ppm Cl2                  < -12
NO                   sensitivity % measured gas @ 5ppm NO                   < 12
SO2                  sensitivity % measured gas @ 5ppm SO2                  < 20
CO                   sensitivity % measured gas @ 5ppm CO                   < 3
H2                   sensitivity % measured gas @ 100ppm H2                 < 0.5
C2H4                 sensitivity % measured gas @ 100ppm C2H4               < 0.1
NH3                  sensitivity % measured gas @ 20ppm NH3                 < 0.1
CO2                  sensitivity % measured gas @ 5% CO2                    < 0.1

 

 

 

KEY SPECIFICATIONS
Temperature range   ℃                                                      -30 to 50
Pressure range      kPa                                                     80 to 120
Humidity range      % rh                                                    15 to 90
Storage period      months @ 3 to 20℃ (stored in sealed pot)               6
Load resistor       Ω (ISB circuit is recommended)                         33 to 100
Weight              g                                                       < 13