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H2S-A1 Hydrogen Sulfide Sensors

H2S-A1 Hydrogen Sulfide Sensors

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H2S-A1 Hydrogen Sulfide Sensors

Product catalog summary

Performance Specifications:

Sensitivity: 550 to 875 nA/ppm in 20ppm H₂S.
Response Time: t90 < 25 seconds from zero to 20ppm H₂S.
Zero Current: < 0.3 ppm equivalent in zero air.
Resolution: RMS noise < 0.05 ppm equivalent.
Range: Performance warranty limit at 100 ppm H₂S.
Linearity: 0 to -4 ppm error at full scale, linear at zero and 20ppm H₂S.
Overgas Range: Maximum 500 ppm for stable response to gas pulse.

Lifetime Specifications:

Zero Drift: < 0.1 ppm equivalent change/year in lab air.
Sensitivity Drift: < 4% change/year in lab air, monthly test.
Operating Life: > 24 months until 80% original signal (24-month warranty).

Environmental Specifications:

Sensitivity at -20°C: 78 to 93% (output @ -20°C/output @ 20°C) @ 20ppm.
Sensitivity at 50°C: 100 to 110% (output @ 50°C/output @ 20°C) @ 20ppm.
Zero at -20°C: < ± 0.2 ppm equivalent change from 20°C.
Zero at 50°C: < ± 0.2 ppm equivalent change from 20°C.

Cross Sensitivity:

SO₂ Sensitivity: < 10% measured gas @ 20ppm SO₂.
NO Sensitivity: < 4% measured gas @ 50ppm NO.
NO₂ Sensitivity: < -20% measured gas @ 10ppm NO₂.
Cl₂ Sensitivity: < -25% measured gas @ 10ppm Cl₂.
H₂ Sensitivity: < 0.2% measured gas @ 400ppm H₂.
C₂H₄ Sensitivity: < 0.5% measured gas @ 400ppm C₂H₄.
CO Sensitivity: < 1.5% 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: < 6 g.

Figures and Diagrams:

Figure 1: H2S-A1 Schematic Diagram showing dimensions in millimeters.
Figure 2: Sensitivity Temperature Dependence illustrating variation in sensitivity with temperature changes.
Figure 3: Zero Temperature Dependence showing variation in t90 response with temperature changes.
Figure 4: Sensitivity Long Term Stability demonstrating excellent long-term stability due to patented design and superior electrochemistry.

Additional Notes:

All sensors are tested at ambient environmental conditions with a 10-ohm load resistor unless otherwise stated. Customers are advised to test under their own conditions to ensure suitability for their requirements. Alphasense Ltd reserves the right to change design features and specifications without prior notification.

Catalog excerpts

Figure 1 H2S-A1 Schematic Diagram > All dimensions in millimetres ( 0.1mm) Top ViewBottom ViewSide View PERFORMANCE SensitivitynA/ppm in 20ppm H > 2 S550 to 875Response timet > 90 (s) from zero to 20ppm H > 2 S< 25Zero currentppm equivalent in zero air< 0.3ResolutionRMS noise (ppm equivalent)< 0.05Rangeppm H > 2 Slimit of performance warranty100Linearityppm error at full scale, linear at zero and 20ppm H > 2 S0 to - 4Overgas rangemaximum ppm for stable response to gas pulse500 LIFETIME Zero driftppm equivalent change/year in lab air< 0.1Sensitivity drift% change/year in lab air, monthly test< 4Operating lifemonths until 80% original signal > (24 month warranted) > 24 ENVIRONMENTAL Sensitivity @ -20ѰC% (output @ -20C/output @ 20аC) @ 20ppm78 to 93Sensitivity @ 50C% (output @ 50аC/output @ 20C) @ 20ppm100 to 110 Zero @ -20аCppm equivalent change from 20C< б 0.2 Zero @ 50Cppm equivalent change from 20аC< 0.2 CROSS SO > 2 sensitivity% measured gas @ 20ppmSO > 2 < 10 SENSITIVITY NOsensitivity% measured gas @ 50ppmNO< 4NO > 2 sensitivity% measured gas @ 10ppmNO > 2 < -20Cl > 2 sensitivity% measured gas @ 10ppmCl > 2 < -25H > 2 sensitivity% measured gas @ 400ppmH > 2 < 0.2C > 2 H > 4 sensitivity% measured gas @ 400ppmC > 2 H > 4 < 0.5COsensitivity% measured gas @ 400ppmCO< 1.5NH > 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< 6 > 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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