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Miniature Size Hydrogen Cyanide Sensor (HCN Sensor) - HCN-D4

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• Range: 50ppm limit of performance warranty
• Sensitivity: 30 to 50 nA/ppm 20ppm HCN
• Response time t90: < 50s from zero to 20ppm HCN
• Resolution: < 0.3 RMS noise (ppm equivalent)
• Pressure range: 80 to 120 kPa
• Humidity range: 15 to 90 %rh (see note below)
• Storage period: 6 months @ 3 to 20°C (stored in sealed pot)
• Weight: < 2 g

Model Number: HCN-D4
Data Sheet:

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Product Specification

HCN-D4 Hydrogen Cyanide Sensor (HCN Sensor) Description
Alphasense is expanding its line of electrochemical toxic gas sensors to address industry-specific requirements, including emissions monitoring, process safety, environmental monitoring and VOCs.

Hydrogen Cyanide (HCN)
In manufacturing, the use of Styrene Acrylonitrile for food packaging and other consumer products has increased the danger of HCN generated during fires. Alphasense has responded to this issue with HCN sensors with fast response and stable output.
Available in A, B and D series.

HCN-D4 Hydrogen Cyanide Sensor (HCN Sensor) PERFORMANCE
Sensitivity	nA/ppm 20ppm HCN	30 to 50
Response time	t90 (s) from zero to 20ppm HCN	< 50
Zero current	ppm equivalent in zero air	± 5
Resolution	RMS noise (ppm equivalent)	< 0.3
Range	ppm limit of performance warranty	50
Linearity	ppm error at full scale, linear at zero, 200ppm HCN	0 to -4
Overgas limit	maximum ppm for stable response to gas pulse	250

HCN-D4 Hydrogen Cyanide Sensor (HCN Sensor) LIFETIME
Zero drift	ppm equivalent change/year in lab air	nd
Sensitivity drift	% change/year in lab air, monthly test	nd
Operating life	months until 80% original signal (12 month warranted)	> 12

HCN-D4 Hydrogen Cyanide Sensor (HCN Sensor) ENVIRONMENTAL
Sensitivity @ -10°C	% (output @ -20°C/output @ 20°C) @ 20ppm	55 to 90
Sensitivity @ 50°C	% (output @ 50°C/output @ 20°C) @ 20ppm	105 to 120
Zero @ -20°C	ppm equivalent change from20°C	< ± 1
Zero @ 50°C	ppm equivalent change from 20°C	< ± 1

HCN-D4 Hydrogen Cyanide Sensor (HCN Sensor) CROSS SENSITIVITY
H2S sensitivity	% measured gas @ 20ppm H2S	< 50
NO2 sensitivity	% measured gas @ 10ppm NO2	< -120
Cl2 sensitivity	% measured gas @ 10ppm Cl2	< -40
NO sensitivity	% measured gas @ 50ppm NO	< -1
SO2 sensitivity	% measured gas @ 20ppm SO2	< 25
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	< 5

HCN-D4 Hydrogen Cyanide Sensor (HCN Sensor) KEY SPECIFICATIONS
Temperature range	°C	-10 to 50 -30 to -10 with reduced sensitivity
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