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Chlorine Sensor (CL2 Sensor) - CL2-B1

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• Range: 20 ppm limit of performance warranty
• Sensitivity: -600 to -1150 nA/ppm in 10ppm Cl2
• Response time t90: < 60 (s) from zero to 10ppm Cl2
• Resolution: < 0.02 RMS noise (ppm equivalent)
• Operating life: > 24 months
• Temperature range: -20 to 50°C
• Pressure range: 80 to 120 kPa
• Humidity range: 15 to 90 % rh continuous
• Weight: < 13 g

Model Number: CL2-B1
Data Sheet:

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Product Specification

CL2-B1 Chlorine Sensor (CL2 Sensor) Description
Alphasense Chlorine gas sensors operate using proven fuel cell technology.

CL2-B1 Chlorine Sensor size:
32mmdiameter package, the best choice for fixed site application

The Cl2 range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 20ppb and an operating range from +0 to 20ppm. The sensors are suitable for inclusion in fixed installation sensing heads and portable safety instruments.

These sensors have improved transient response to humidity changes compared to competitors’ equivalent sensors.

The Cl2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification.

CL2-B1 Chlorine Sensor (CL2 Sensor) PERFORMANCE
Sensitivity	nA/ppm in 10ppm Cl2	-600 to -1150
Response time	t90 (s) from zero to 10ppm Cl2 (33Ω load resistor)	< 60
Zero current	ppm equivalent in zero air	± 0.2
Resolution	RMS noise (ppm equivalent) (33Ω load resistor)	< 0.02
Range	ppm limit of performance warranty	20
Linearity	ppm error at full scale, linear at zero and 10ppm Cl2	< ± 0.2
Overgas limit	maximum ppm for stable response to gas pulse	60

CL2-B1 Chlorine Sensor (CL2 Sensor) LIFETIME
Zero drift	ppm equivalent change/year in lab air	< 0.03
Sensitivity drift	% change/year in lab air, monthly test	< 6
Operating life	months until 80% original signal (24 month warranted)	> 24

CL2-B1 Chlorine Sensor (CL2 Sensor) ENVIRONMENTAL
Sensitivity @ -20°C	% (output @ -20°C/output @ 20°C) @ 10ppm	70 to 90
Sensitivity @ 50°C	% (output @ 50°C/output @ 20°C) @ 10ppm	90 to 105
Zero @ -20°C	ppm equivalent change from 20°C	< 0 to 0.1
Zero @ 50°C	ppm equivalent change from 20°C	< 0 to -1

CL2-B1 Chlorine Sensor (CL2 Sensor) CROSS SENSITIVITY
H2S sensitivity	% measured gas @ 20ppm H2S	-100
NO2 sensitivity	% measured gas @ 10ppm NO2	100
NO sensitivity	% measured gas @ 50ppm NO	< 0.5
SO2 sensitivity	% measured gas @ 20ppm SO2	< -2
CO sensitivity	% measured gas @ 400ppm CO	< 0.1
H2 sensitivity	% measured gas @ 400ppm H2	< 0.1
C2H4 sensitivity	% measured gas @ 400ppm C2H4	< 0.1
NH3 sensitivity	% measured gas @ 20ppm NH3	< 0.1
CO2 sensitivity	% measured gas @ 5% (Vol) CO2	0

CL2-B1 Chlorine Sensor (CL2 Sensor) KEY SPECIFICATIONS
Temperature range	°C	-20 to 50
Pressure range	kPa	80 to 120
Humidity range	% rh continuous (see note below)	15 to 90
Storage period	months @ 3 to 20°C (stored in sealed pot)	6
Load resistor	Ω (for optimum performance)	33
Weight	g	< 13

Matched Transmitter board for CL2-B1 CL2 Sensor

4-20mA Analogue Transmitter Board
• Factory calibration, custom-set for immediate use
• Wide operating voltage range
• Low RFI susceptibility
Alphasense 4-20 mA analogue transmitter boards provide a cost effective way for Original Equipment Manufacturers to engineer transmitter heads for fixed installation systems.

4-20mA 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