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H2S-BE Hydrogen Sulfide Sensors

H2S-BE Hydrogen Sulfide Sensors

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H2S-BE Hydrogen Sulfide Sensors

Product catalog summary

Performance Specifications

Sensitivity: 80 to 115 nA/ppm in 200ppm H₂S.
Response Time: t90 < 35 seconds from zero to 200ppm H₂S.
Zero Current: < ± 0.7 ppm equivalent in zero air.
Resolution: RMS noise < 0.5 ppm equivalent.
Range: Performance warranty limit at 2,000 ppm H₂S.
Linearity: Error < 25 ppm at 2000ppm, linear at zero and 400ppm H₂S.
Overgas Range: Stable response to gas pulse up to 10,000 ppm.

Lifetime Specifications

Zero Drift: < 0.25 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: 83 to 93% (output @ -20°C/output @ 20°C) @ 200ppm.
Sensitivity at 50°C: 102 to 110% (output @ 50°C/output @ 20°C) @ 200ppm.
Zero at -20°C: < ± 4 ppm equivalent change from 20°C.
Zero at 50°C: < ± 4 ppm equivalent change from 20°C.

Cross Sensitivity

SO₂ Sensitivity: < 20% measured gas @ 20ppm SO₂.
NO Sensitivity: < 10% measured gas @ 50ppm NO.
NO₂ Sensitivity: < -25% measured gas @ 10ppm NO₂.
Cl₂ Sensitivity: < -12% measured gas @ 10ppm Cl₂.
H₂ Sensitivity: < 0.2% measured gas @ 400ppm H₂.
C₂H₄ Sensitivity: < 0.25% measured gas @ 400ppm C₂H₄.
CO Sensitivity: < 4% measured gas @ 400ppm CO.
NH₃ Sensitivity: < 0.1% measured gas @ 20ppm NH₃.

Key Specifications

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

Additional Information

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

Figures included in the document illustrate sensitivity and zero output variations with temperature, and response to H₂S concentrations up to 1%.

Catalog excerpts

Figure 1 H2S-BE Schematic Diagram > PATENTED 16.6 All dimensions in millimetres ( 0.1mm) Top ViewBottom ViewSide View PERFORMANCE SensitivitynA/ppm in 200ppm H > 2 S80 to 115Response timet > 90 (s) from zero to 200ppm H > 2 S< 35Zero currentppm equivalent in zero air< ѱ 0.7ResolutionRMS noise (ppm equivalent)< 0.5Rangeppm H > 2 S limit of performance warranty2,000Linearityppm error at 2000ppm, linear at zero and 400ppm H > 2 S< 25Overgas rangemaximum ppm for stable response to gas pulse10,000 LIFETIME Zero driftppm equivalent change/year in lab air< 0.25Sensitivity drift% change/year in lab air, monthly test< 2Operating lifemonths until 80% original signal > Logo.jpg (24 month warranted) > 24 ENVIRONMENTAL Sensitivity @ -20C% (output @ -20аC/output @ 20C) @ 200ppm83 to 93Sensitivity @ 50аC% (output @ 50C/output @ 20аC) @ 200ppm102 to 110 Zero @ -20Cppm equivalent change from 20аC< 4 Zero @ 50ѰCppm equivalent change from 20C< б 4 CROSS SO > 2 sensitivity% measured gas @ 20ppmSO > 2 < 20 SENSITIVITY NOsensitivity% measured gas @ 50ppmNO< 10NO > 2 sensitivity% measured gas @ 10ppmNO > 2 < -25Cl > 2 sensitivity% measured gas @ 10ppmCl > 2 < -12H > 2 sensitivity% measured gas @ 400ppmH > 2 < 0.2C > 2 H > 4 sensitivity% measured gas @ 400ppmC > 2 H > 4 < 0.25COsensitivity% measured gas @ 400ppmCO< 4NH > 3 sensitivity% measured gas @ 20ppmNH > 3 < 0.1 KEY Temperature rangeC-30 to 50 SPECIFICATIONS Pressure rangekPa80 to 120Humidity range% rh continuous15 to 90Storage periodmonths @ 3 to 20аC (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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