Gas Measured Nitrogen Dioxide (NO2)
Cartridge Part Number MIDAS-S-NO2 1 year standard warranty
MIDAS-E-NO2 2 year extended warranty
Sensor Technology 3 electrode electrochemical cell
Measuring Range (ppm) NO2 0 – 12ppm
Minimum Alarm 1 Set Point 1.50ppm
Repeatability < ± 2% of measured value
Linearity < ± 10% of measured value
Response Time t62.5 < 15 seconds
Sensor Cartridge Life Expectancy ≥ 24 months under typical application conditions
Operating Temperature 0°C to +40°C (32°F to 104°F)
Effect of Temperature
Zero < ± 0.01ppm / °C
Sensitivity < ± 0.7% of measured value / °C
Operating Humidity (continuous) 15 – 90% rH
Effect of Humidity
Zero No effect
Sensitivity < ± 0.5% of measured value / % rH
Operating Pressure 90 – 110kPa
Effect of Position No effect in typical application
Long Term Drift
Zero No drift
Sensitivity < 2% of measured value / month
Calibration Gas Nitrogen Dioxide (NO2)
Challenge Gas (Bump Test) Nitrogen Dioxide (NO2)
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 / Vapor Chemical Concentration Reading
Formula applied (ppm) (ppm NO2)
Carbon Monoxide CO 300 0
Chlorine Cl2 1 1
Hydrogen Sulphide H2S 15 - 1.2
Nitric Oxide NO 35 0
Sulphur Dioxide SO2 5 0