Honeywell MIDAS Sensor Cartridge for Sulfur Dioxide (SO2) 0.7-8 ppm



Honeywell MIDAS Sensor Cartridge for Sulfur Dioxide (SO2) 0.7-8 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 MeasuredSulfur Dioxide (SO2)
Cartridge Part NumberMIDAS-E-SO22 year extended warranty
Sensor Technology3 electrode electrochemical cell
Measuring Range (ppm)SO20 – 8 ppm
Minimum Alarm 1 Set Point1.00 ppm
Repeatability< ± 2% of measured value
Linearity< ± 10% of measured value
Response Time t62.5< 5 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< ± 0.003ppm / ºC (0ºC to 20ºC)
Zero< ± 0.03ppm / ºC (20ºC to 40ºC)
Sensitivity< ± 0.4% of measured value / ºC
Operating Humidity (continuous)15 – 90% rH
Effect of HumidityZeroNo effect
Sensitivity< ± 1% of measured value / % rH
Operating Pressure90 – 110kPa
Effect of PositionNo effect in typical application
Long Term DriftZeroTBA
Sensitivity< 2% of measured value / month
Calibration GasSulfur Dioxide (SO2)
Challenge Gas (Bump Test)Sulfur 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 HF)
Carbon MonoxideCO300 ppm< 3
Hydrogen SulfideH2S150
Nitric OxideNO350
Nitrogen DioxideNO25-5

Additional information

Weight 1 lbs