Hydrogen Cyanide Gas Sensor (HCN Sensor) - 4HN CiTiceL

  • Hydrogen Cyanide Gas Sensor (HCN Sensor)
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• Operating Principle: 3-electrode electrochemical
• Measurement Range: 0 - 50 ppm HCN
• Filter: None
• Sensitivity: 0.10 ± 0.02 µA/ppm
• Response Time (T90): <200 Seconds at 20°C
• Resolution (Electronics dependant): 0.5 ppm
• Operating Temperature Range: -20°C to +50°C
• Operating Humidity Range: 15 - 90% RH non-condensing

  • Model Number: 4HN CiTiceL
  • Data Sheet: Date Sheet File
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Product Specification

4HN CiTiceL
Hydrogen Cyanide (HCN) Gas Sensor

APPLICATION NOTE: Not suitable for repeated or continuous exposures 
4HN is designed for life safety applications where the sensor is only exposed to gas occasionally. Repeated or continuous exposures will result in significant output drift and shortened operating life.
If the sensor is exposed to gas, functionality and performance characteristics should be checked to confirm that the sensor is still performing within acceptable limits.

Technical Specifications

Operating Principle 3-electrode electrochemical
Measurement Range 0 - 50 ppm HCN
Filter None
Sensitivity* 0.10 ± 0.02 µA/ppm
Response Time (T90)* <200 Seconds at 20°C
Resolution (Electronics dependant) 0.5 ppm
Baseline Offset (clean air) -0.5 to +0.5 ppm HCN equivalent
Recommended Load Resistor 10 Ω
Bias Voltage Not Required
Weight 5 g
Housing Material:
Body ABS
Orientation Any
Operating Temperature Range -20°C to +50°C
Recommended Storage Temp 0°C to 20°C
Operating Pressure Range Atmospheric ± 10%
Operating Humidity Range 15 - 90% RH non-condensing
Expected Operating Life Two years in air
Storage Life 6 months in CTL container

* Specifications are valid at 20°C, 50% RH and 1013 mBar, using City Technology recommended circuitry. Performance characteristics outline the performance of sensors supplied within the first 3 months. Output signal can drift below the lower limit over time. 

CiTiceLs are designed for operation in a wide range of environments and harsh conditions. However, it is important that exposure to high concentrations of solvent vapours is avoided, both during storage, fitting into instruments
and operation.

When using sensors with printed circuit boards (PCBs), degreasing agents should be used before the sensor is fitted. Do not glue directly on or near the CiTiceL as the solvent may cause crazing of the plastic.

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