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Miniature Size Carbon Monoxide Sensor (CO Sensor) - CO-D4

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• Range: 1,000ppm limit of performance warranty
• Sensitivity: 30 to 55nA/ppm in 400ppm CO
• Response time t90: < 25s from 0 to 400ppm CO % 22°C
• Resolution: < 1.5RMS noise (ppm equivalent)
• Temperature range: -20 to 50°C
• Pressure range: 80 to 120 kPa
• Humidity range: 15 to 90 %rh (see note below)
• Weight: < 2 g

Model Number: CO-D4
Data Sheet:

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Product Specification

CO-D4 Carbon Monoxide Sensor (CO Sensor) Description
Alphasense Carbon Monoxide gas sensors operate using proven fuel cell technology.

CO-D4 Carbon Monoxide Sensor size:
miniature, with proven long-term performance. Sensors for the next generation of portable gas detectors

The Alphasense family of CO sensors have proven themselves in the field with long term stability and reliable operation, well beyond the two-year warranty, using our patented electrode technology.

CO-D4 Carbon Monoxide Sensor (CO Sensor) PERFORMANCE
Sensitivity	nA/ppm in 400ppm CO	30 to 55
Response time	t90 (s) from zero to 400ppm CO % 22°C	< 25
Zero current	ppm equivalent in zero air	< ± 3
Resolution	RMS noise (ppm equivalent)	< 1.5
Range	ppm limit of performance warranty	1,000
Linearity	ppm CO error at full scale, linear at zero and 400ppm CO	±40
Overgas limit	maximum ppm for stable response to gas pulse	2,000

CO-D4 Carbon Monoxide Sensor (CO Sensor) LIFETIME
Zero drift	ppm equivalent change/year in lab air	< 0.5
Sensitivity drift	% change/year in lab air, monthly test	< 6
Operating life	months until 80% original signal (24 month warranted)	> 24

CO-D4 Carbon Monoxide Sensor (CO Sensor) ENVIRONMENTAL
Sensitivity @ -20°C	% (output @ -20°C /output @ 20°C) @ 400ppm CO	45 to 70
Sensitivity @ 50°C	% (output @ 50°C /output @ 20°C) @ 400ppm CO	105 to 125
Zero @ -20°C	ppm equivalent change from20°C	< ± 2
Zero @ 50°C	ppm equivalent change from 20°C	< ± 4

CO-D4 Carbon Monoxide Sensor (CO Sensor) CROSS SENSITIVITY
Filter capacity	ppm·hrs H2S	20,000
H2S sensitivity	% measured gas @ 20ppm H2S	< 0.1
NO2 sensitivity	% measured gas @ 10ppm NO2	< 0.1
Cl2 sensitivity	% measured gas @ 10ppm Cl2	< 0.1
NO sensitivity	% measured gas @ 50ppm NO	< 50
SO2 sensitivity	% measured gas @ 20ppm SO2	< 0.1
H2 sensitivity	% measured gas @ 400ppm H2	< 70
C2H4 sensitivity	% measured gas @ 400ppm C2H4	< 100
NH3 sensitivity	% measured gas @ 20ppm NH3	< 0.1

CO-D4 Carbon Monoxide Sensor (CO Sensor) KEY SPECIFICATIONS
Temperature range	°C	-20 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