Output: | Analog Sensor |
---|---|
Usage: | Gas Sensor |
Model Number: | H2S-B4 |
Brand Name: | Alphasense |
Place of Origin: | United Kingdom |
Quick Details
Specifications
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