Honeywell MIDAS Sensor Cartridge for Hydrogen Cyanide (HCN) 1.8-20 ppm



Honeywell MIDAS Sensor Cartridge for Hydrogen Cyanide (HCN) 1.8-20 ppm

Several Honeywell MIDAS® cartridges can be configured to read a number of different gases based on a common chemical family. Actual details for the sensor detection range are included in the sensor cartridge specification sheet and the MIDAS® technical manual. MIDAS® sensor cartridges can be ordered as part of a Kit with the universal MIDAS® transmitter, or as a replacement part. The detectable range is listed. With the exception of O2 (where ambient concentration is typically 20.9%), the sensors will display zero when no gas is present. All Cartridges with the format MIDAS-E-XXX are supplied with a 2 year (24 month) warranty.
Gas MeasuredHydrogen Cyanide (HCN)
Cartridge Part NumberMIDAS-E-HCN2 year extended warranty
Sensor Technology3 electrode electrochemical cell
Measuring Range (ppm)HCN0 – 20 ppm
Minimum Alarm 1 Set Point4 ppm
Repeatability< ± 2% of measured value
Linearity< ± 4% of measured value
Response Time t62.5< 15 seconds
Sensor Cartridge Life Expectancy≥ 24 months under typical application conditions
Operating Temperature0°C to +40°C (32°F to 104°F)
Effect of Temperature< ± 0.008ppm / °C (0°C to 20°C)
Zero< ± 0.03ppm / °C (20°C to 40°C)
Sensitivity< ± 2.5% of measured value / °C
Operating Humidity (continuous)15 – 90% rH
Effect of HumidityZeroTBA
Sensitivity< ± 1% of measured value / % rH
Operating Pressure90 – 110kPa
Effect of PositionNo effect in typical application
Long Term DriftZeroNo effect
Sensitivity< ± 2% of measured value / month
Calibration GasHydrogen Cyanide (HCN)
Challenge Gas (Bump Test)Sulphur Dioxide (SO2)
Warm Up Time< 10 minutes
Storage Temperature+5°C to +25°C (+41°F to +77°F)
Cross Sensitivities

Each Midas sensor is potentially cross sensitive to other gases and this may cause a gas reading when exposed to other gases than those originally designated. The table below presents typical readings that will be observed when a new sensor cartridge is exposed to the cross sensitive gas (or a mixture of gases containing the cross sensitive species).
Gas / VaporChemical FormulaConcentration applied (ppm)Reading (ppm HCN)
Carbon MonoxideCO300< 15
Hydrogen SulfideH2S 1590
EthyleneC2H4100< 25
Nitrogen DioxideNO25-20 to <-10
Nitric OxideNO35-17.5 to 0
Sulfur DioxideSO22040 to 75

Additional information

Weight 1 lbs