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Miniature Size Hydrogen Sulfide Sensor - H2S-D4

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• Range: 100 ppm H2S limit of performance warranty
• Sensitivity: 110 to 170 nA/ppm 20ppm H2S
• Response time t90: < 25 (s) from zero to 20ppm H2S
• Resolution: < 0.2 RMS noise (ppm equivalent)
• Temperature range : -30 to 50 ℃
• Pressure range : 80 to 120 kPa
• Humidity range: 15 to 90%rh (see note below)
• Weight : < 2 g

Model Number: H2S-D4
Data Sheet:

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Product Specification

H2S-D4 Hydrogen Sulfide Sensor (H2S Sensor) Description
Alphasense Hydrogen Sulfide gas sensors operate using well-known fuel cell technology.

H2S-D4 Hydrogen Sulfide Sensor size:
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-D4 Hydrogen Sulfide Sensor (H2S Sensor) PERFORMANCE
Sensitivity		nA/ppm 20ppm H2S	110 to 170
Response time		t90 (s) from zero to 20ppm H2S	< 25
Zero current		ppm equivalent in zero air	< ±1
Resolution		RMS noise (ppm equivalent)	< 0.2
Range		ppm H2S limit of performance warranty	100
Linearity		ppm error at full scale, linear at zero and 20ppm H2S	< ±6
Overgas limit		maximum ppm for stable response to gas pulse	200

H2S-D4 Hydrogen Sulfide Sensor (H2S Sensor) LIFETIME
Zero drift		ppm equivalent change/year in lab air	< 0.2
Sensitivity drift		% change/year in lab air, monthly test	< 3
Operating life		months until 80% original signal(24 month warranted)	> 24

H2S-D4 Hydrogen Sulfide Sensor (H2S Sensor) ENVIRONMENTAL
Sensitivity @ -20°C		% (output @ -20°C/output @ 20°C) @ 20ppm	75 to 90
Sensitivity @ 50°C		% (output @ 50°C/output @ 20°C) @ 20ppm	103 to 112
Zero @ -20°C		ppm equivalent change from20°C	< -0.3 to 0.2
Zero @ 50°C		ppm equivalent change from 20°C	< ±1

H2S-D4 Hydrogen Sulfide Sensor (H2S Sensor) CROSS SENSITIVITY
NO2 sensitivity	% measured gas @ 10ppm NO2		< -25
Cl2 sensitivity	% measured gas @ 10ppm Cl2		< -25
NO sensitivity	% measured gas @ 50ppm NO		< 12
SO2 sensitivity	% measured gas @ 20ppm SO2		< 20
CO sensitivity	% measured gas @ 400ppm CO		< 1.5
H2 sensitivity	% measured gas @ 400ppm H2		< 1
C2H4 sensitivity	% measured gas @ 400ppm C2H4		< 0.1
NH3 sensitivity	% measured gas @ 20ppm NH3		< 0.1

H2S-D4 Hydrogen Sulfide Sensor (H2S Sensor) KEY SPECIFICATIONS
Temperature range		°C	-30 to 50
Pressure range		kPa	80 to 120
Humidity range		%rh (see note below)	15 to 90
Storage period		months @ 3 to 20°C (stored in sealed pot)	6
Load resistor		Ω (recommended)	10 to 47
Weight		g	< 2