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H2S-BH Hydrogen Sulfide Sensors

H2S-BH Hydrogen Sulfide Sensors

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H2S-BH Hydrogen Sulfide Sensors

Product catalog summary

Performance Specifications:

Sensitivity: 1,400 to 2,000 nA/ppm in 20ppm H₂S.
Response Time: t90 < 30 seconds from zero to 20ppm H₂S.
Zero Current: ± 0.1 ppm equivalent in zero air.
Resolution: RMS noise < 0.02 ppm equivalent.
Range: Performance warranty limit at 50 ppm H₂S.
Linearity: Error < ± 0.3 ppm at full scale, linear at zero and 20ppm H₂S.
Overgas Range: Maximum 200 ppm for stable response to gas pulse.

Lifetime Specifications:

Zero Drift: < 0.02 ppm equivalent change/year in lab air.
Sensitivity Drift: < 2% change/year in lab air, tested monthly.
Operating Life: > 24 months until 80% of original signal (24-month warranty).

Environmental Specifications:

Sensitivity at -20°C: 81% to 96% of output at 20°C.
Sensitivity at 50°C: 102% to 110% of output at 20°C.
Zero at -20°C: ± 0.1 ppm equivalent change from 20°C.
Zero at 50°C: ± 0.15 ppm equivalent change from 20°C.

Cross Sensitivity:

SO₂ Sensitivity: < 10% at 20ppm SO₂.
NO Sensitivity: < 3% at 50ppm NO.
NO₂ Sensitivity: < -30% at 10ppm NO₂.
Cl₂ Sensitivity: < -25% at 10ppm Cl₂.
H₂ Sensitivity: < 0.25% at 400ppm H₂.
C₂H₄ Sensitivity: < 0.1% at 400ppm C₂H₄.
CO Sensitivity: < 1% at 400ppm CO.
NH₃ Sensitivity: < 0.1% at 20ppm NH₃.

Key Specifications:

Temperature Range: -30°C to 50°C.
Pressure Range: 80 to 120 kPa.
Humidity Range: 15% to 90% RH continuous.
Storage Period: 6 months at 3 to 20°C (stored in sealed pot).
Weight: < 13g.

Additional Notes:

All sensors are tested under ambient environmental conditions with a 10-ohm load resistor unless otherwise stated. Customers should test under their own conditions to ensure suitability for their requirements. Alphasense Ltd provides this information without legal responsibility.

Figures:

Figure 1: H2S-BH Schematic Diagram.
Figure 2: Sensitivity Temperature Dependence.
Figure 3: Zero Temperature Dependence.
Figure 4: Zero Long Term Stability over 2 years.

Catalog excerpts

Figure 1 H2S-BH Schematic Diagram PATENTED > All dimensions in millimetres ( 0.1mm) Top ViewBottom ViewSide View PERFORMANCE SensitivitynA/ppm in 20ppm H > 2 S1,400 to 2,000Response timet > 90 (s) from zero to 20ppm H > 2 S< 30Zero currentppm equivalent in zero airѱ 0.1ResolutionRMS noise (ppm equivalent)< 0.02Rangeppm H > 2 S limit of performance warranty50Linearityppm error at full scale, linear at zero and 20ppm H > 2 S< 0.3Overgas rangemaximum ppm for stable response to gas pulse200 LIFETIME Zero driftppm equivalent change/year in lab air< 0.02Sensitivity drift% change/year in lab air, monthly test< 2Operating lifemonths until 80% original signal (24 month warranted)> 24 ENVIRONMENTAL Sensitivity @ -20ѰC% (output @ -20C/output @ 20аC) @ 20ppm81 to 96Sensitivity @ 50C% (output @ 50аC/output @ 20C) @ 20ppm102 to 110 Zero @ -20аCppm equivalent change from20Cб 0.1Zero @ 50Cppm equivalent change from 20аC 0.15 CROSS SO > 2 sensitivity% measured gas @ 20ppmSO > 2 < 10 SENSITIVITY NOsensitivity% measured gas @ 50ppmNO< 3NO > 2 sensitivity% measured gas @ 10ppmNO > 2 < -30Cl > 2 sensitivity% measured gas @ 10ppmCl > 2 < -25H > 2 sensitivity% measured gas @ 400ppmH > 2 < 0.25C > 2 H > 4 sensitivity% measured gas @ 400ppmC > 2 H > 4 < 0.1COsensitivity% measured gas @ 400ppmCO< 1NH > 3 sensitivity% measured gas @ 20ppmNH > 3 < 0.1 KEY Temperature rangeѰC-30 to 50 SPECIFICATIONS Pressure rangekPa80 to 120Humidity range% rh continuous15 to 90Storage periodmonths @ 3 to 20C (stored in sealed pot)6Weightg< 13 > TT TTTecec ececechnical Specifhnical Specifhnical Specifhnical Specifhnical Specificaica icaicaicationtion tiontiontion NOTE: all sensors are tested at ambient environmental conditions, with 10 ohm load resistor, unless otherwise stated. As applications of use are outside our control,the information provided is given without legal responsibility. Customers should test under their own conditions, to ensure that the sensors are suitable for their ownrequirements. Alphasense Ltd, Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. CM77 7AA. UKTelephone: +44 (0) 1376 556 700 Fax: +44 (0) 137 6 335 899 E-mail: [email protected] Website: www.alphasense.com size="-3">

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