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Hydrogen Cyanide Sensor (HCN Sensor) - HCN-A1

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• Range: 100ppm HCN limit of performance warranty
• Sensitivity: 55 to 85 nA/ppm in 30ppm HCN
• Response time t90: < 70s from zero to 30ppm HCN
• Resolution: < 0.05 RMS noise (ppm equivalent)
• Temperature range: -30 to 50°C
• Pressure range: 80 to 120kPa
• Humidity range: 15 to 90% rh continuous
• Weight: < 6g

Model Number: HCN-A1
Data Sheet:

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Product Specification

HCN-A1 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-A1 Hydrogen Cyanide Sensor HCN Sensor Schematic Diagram

HCN-A1 Hydrogen Cyanide Sensor HCN Sensor PERFORMANCE
Sensitivity	nA/ppm in 30ppm HCN	55 to 85
Response time	t90 (s) from zero to 30ppm HCN	< 70
Zero current	ppm equivalent in zero air	< ±2
Resolution	RMS noise (ppm equivalent)	< 0.05
Range	ppm HCN limit of performance warranty	100
Linearity	ppm error at full scale, linear at zero, 40ppm HCN	4 to 8
Overgas limit	maximum ppm for stable response to gas pulse	150

HCN-A1 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-A1 Hydrogen Cyanide Sensor HCN Sensor ENVIRONMENTAL
Sensitivity @ -20°C	% (output @ -20°C/output @ 20°C) @ 30ppm HCN	75 to 95
Sensitivity @ 50°C	% (output @ 50°C/output @ 20°C) @ 30ppm HCN	105 to 120
Zero @ -20°C	ppm equivalent change from 20°C	< 0 to 1
Zero @ 50°C	ppm equivalent change from 20°C	< ±1

HCN-A1 Hydrogen Cyanide Sensor HCN Sensor CROSS SENSITIVITY
H2S sensitivity	% measured gas @ 20ppm H2S	< 300
NO2 sensitivity	% measured gas @ 10ppm NO2	< -180
Cl2 sensitivity	% measured gas @ 10ppm Cl2	< -12
NO sensitivity	% measured gas @ 50ppm NO	< 1
SO2 sensitivity	% measured gas @ 20ppm SO2	< 10 (transient)
CO sensitivity	% measured gas @ 400ppm CO	< 0.1
H2 sensitivity	% measured gas @ 400ppm H2	< 0.1
C2H4 sensitivity	% measured gas @ 80ppm C2H4	< 0.1
NH3 sensitivity	% measured gas @ 20ppm NH3	< 1
CO2 sensitivity	% measured gas @ 5% volume CO2	< 0.1

HCN-A1 Hydrogen Cyanide Sensor HCN 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 @ 3 to 20°C (stored in original container)	6
Load resistor	Ω (recommended)	10 to 33
Bias voltage	mV	not required
Weight	g	< 6

Matched Transmitter board for HCN-A1 HCN Sensor

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