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Carbon Monoxide Sensor CO Sensor Compliant for Stack Gases - CO-AX

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• Range: 2,000ppm CO limit of performance warranty
• Sensitivity: 55 to 100nA/ppm in 400ppm CO
• Response time t90: < 30s from zero to 400ppm CO
• Resolution: < 0.5 RMS noise (ppm equivalent)
• Temperature range: -30 to 50°C
• Pressure range: 80 to 120 kPa
• Humidity range: 15 to 90 % rh continuous
• Storage period: 6 months @ 0 to 20°C

Model Number: CO-AX
Data Sheet:

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Product Specification

CO-AX Carbon Monoxide Sensor CO Sensor Description

Alphasense Carbon Monoxide gas sensors operate using proven fuel cell technology.

CO-AX Carbon Monoxide Sensor size:
20mm diameter, the industry standard size for 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. The 'X' sensors have low hydrogen sensitivity, as drop-in replacements for the standard ‘F’ sensors.

CO-AX Carbon Monoxide Sensor CO Sensor PERFORMANCE
Sensitivity	nA/ppm in 400ppm CO	55 to 100
Response time	t90 (s) from zero to 400ppm CO	< 30
Zero current	ppm equivalent in zero air	< ± 3
Resolution	RMS noise (ppm equivalent)	< 0.5
Range	ppm CO limit of performance warranty	2,000
Linearity	ppm error at full scale, linear at zero and 800ppm CO	< ±40
Overgas limit	maximum ppm for stable response to gas pulse	4,000

CO-AX Carbon Monoxide Sensor CO Sensor LIFETIME
Zero drift	ppm equivalent change/year in lab air	<0.2
Sensitivity drift	% change/year in lab air, monthly test	<6
Operating life	months until 80% original signal (24 month warranted)	> 24

CO-AX Carbon Monoxide Sensor CO Sensor ENVIRONMENTAL
Sensitivity @ -20°C	% (output @ -20°C/output @ 20°C) @ 400ppm CO	55 to 75
Sensitivity @ 0°C	% (output @ 0°C/output @ 20°C) @ 400ppm CO	75 to 90
Sensitivity @ 40°C	% (output @ 40°C/output @ 20°C) @ 400ppm CO	106 to 120
Zero @ -20°C	ppm equivalent change from 20°C	< 0 to 4
Zero @ 0°C	ppm equivalent change from 20°C	< 0 to 3
Zero @ 50°C	ppm equivalent change from 20°C	< 0 to -6

CO-AX Carbon Monoxide Sensor CO Sensor CROSS SENSITIVITY
Filter capacity	ppm-hours H2S	250,000
Filter capacity	ppm-hours NO2	500,000
Filter capacity	ppm-hours NO	20,000
Filter capacity	ppm-hours SO2	250,000
H2 sensitivity	% measured gas @ 900ppm H2 in 900ppm CO @ 10°C	< 2
H2 sensitivity	% measured gas @ 900ppm H2 in 900ppm CO @ 20°C	< 4
H2 sensitivity	% measured gas @ 900ppm H2 in 900ppm CO @ 30°C	< 6
NO2 sensitivity	% measured gas @ 10ppm NO2	< -1
Cl2 sensitivity	% measured gas @ 10ppm Cl2	< 0.1
NO sensitivity	% measured gas @ 500ppm NO	< -2
SO2 sensitivity	% measured gas @ 20ppm SO2	< 0.1
C2H4 sensitivity	% measured gas @ 400ppm C2H4	< 5
NH3 sensitivity	% measured gas @ 20ppm NH3	< 0.1

CO-AX Carbon Monoxide Sensor CO Sensor KEY SPECIFICATIONS
Temperature range	°C	-30 to 50
Pressure range	kPa	80 to 120
Humidity range	% rh continuous	15 to 90
Storage period	months @ 0 to 20°C (stored in sealed pot)	6
Load resistor	Ω (recommended)	10 to 47
Weight	g	< 6

Matched Transmitter board for CO-AX CO Sensor

4-20 mA Digital Transmitter Board
• Factory calibration, custom-set for immediate use
• Digital zero, sensitivity and temperature compensation
• Digital and 4-20mA output
• Biased or unbiased operation
• Calibration and range change