Hydrogen Sulfide Sensor (H2S Sensor) 4-Electrode - H2S-B4

Range: 100 ppm H2S limit of performance warranty
Sensitivity: 1450 to 2050 nA/ppm at 2ppm H2S
Response time: < 45 t90 (s) from zero to 2ppm H2S
Linearity: < ±4 ppb error at full scale, linear at zero and 40ppm H2S
Temperature range: -30 to 50​ ℃

  • Model Number: H2S-B4
  • Data Sheet: Date Sheet File
Quantity:
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  •  Hydrogen Sulfide Sensor (H2S Sensor) 4-Electrode
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Product Specification

Hydrogen Sulfide Sensor (H2S Sensor) H2S-B4 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



Hydrogen Sulfide Sensor (H2S Sensor) H2S-B4 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



Hydrogen Sulfide Sensor (H2S Sensor) H2S-B4 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



Hydrogen Sulfide Sensor (H2S Sensor) H2S-B4 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



Hydrogen Sulfide Sensor (H2S Sensor) H2S-B4 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

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