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  • Beijing Zetron Technology Co., Ltd
    Dora
    Hello, I already used the equipment in an aluminum smelting plant in Mexico and I was surprised by the function of your company's laser device.
  • Beijing Zetron Technology Co., Ltd
    Sylvia
    Good gas leak detection instrument !!! High accurate test values :D
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Zetron H2S 4 Electrode Hydrogen Sulfide Gas Sensor H2S-B4

  • Zetron H2S 4 Electrode Hydrogen Sulfide Gas Sensor H2S-B4
Place of Origin UK
Brand Name Alphasense
Certification CE
Model Number H2S-B4
Minimum Order Quantity 1
Payment Terms L/C, D/A, D/P, T/T

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Product Details
Sensitivity 1450 To 2150 NA/ppm At 2ppm H2S Response Time T90 < 55 (s) From Zero To 2ppm H2S
Pressure Range 80 To 120 KPa Humidity Range 15 To 90 % Rh Continuous
Range 100 Ppm H2S Limit Of Performance Warranty Weight < 13 G
Temperature Range -30 To 50 ℃
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H2S hydrogen sulfide gas sensor

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4 Electrode hydrogen sulfide gas sensor

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H2S hydrogen sulfide sensor
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Product Description

H2S-B4 Hydrogen Sulfide Sensor (H2S Sensor) Description
Alphasense Hydrogen Sulfide gas sensors operate using well-known fuel cell technology.
Sensors are available in the following sizes:
A: 20mm diameter, the industry standard size for portable gas detectors
B: 32mm diameter package, the best choice for fixed site applications
D: miniature, with proven long-term performance. Sensors for the next generation of portable gas detectors
With very high sensitivity and low zero, accurate and stable readings are possible when measuring current concentration ranges from ppb to 1% H2S.
 

H2S-B4 Hydrogen Sulfide Sensor (H2S Sensor) PERFORMANCE
Sensitivity nA/ppm at 2ppm H2S 1450 to 2150
Response time t90 (s) from zero to 2ppm H2S < 55
Zero current nA in zero air at 20℃ -250 to 200
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  
     
H2S-B4 Hydrogen Sulfide Sensor (H2S Sensor) 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
     
H2S-B4 Hydrogen Sulfide Sensor (H2S Sensor) 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
     
H2S-B4 Hydrogen Sulfide Sensor (H2S Sensor) 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
     
H2S-B4 Hydrogen Sulfide Sensor (H2S Sensor) 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

Matched Transmitter board for H2S-B4 H2S Sensor
Individual Sensor Board (ISB) Alphasense B4 4-Electrode Gas Sensors
The Individual Sensor Board (ISB) is designed for use with the Alphasense B4 family of four-electrode gas sensors. This potentiostat provides a dual channel voltage output.
A low noise bandgap provides the bias voltage for NO sensors and the ISB can measure both oxidising (CO, H2S, SO2 and NO) and reducing (O3 and NO2) gases.
The ISB is configured for specific sensors: NO, NO2, O3 and CO / H2S / SO2 .
Designed for low power applications, the ISB requires 3.5 to 6.4 stable DC supply at only 1mA.
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