Description
Honeywell Midas-M Sulfur Dioxide (SO2) Sensor, 0-8 ppm, 2 years
The Midas-M Sensor Cartridge enables the detection of a wide range of asphyxiant, toxic, flammable, pyrophoric, corrosive, and oxidizer gases. The plug & play Sensor Cartridge is located inside the detector’s chassis.
Note: The SO2 sensor CANNOT be combined with an O3 sensor in a complete Midas-M Sensor Cartridge Package.
Gas Measured | Sulfur Dioxide | |
---|---|---|
Cartridge Part Number | MMS-S2 | |
Sensor Technology | 3 electrode electrochemical cell | |
Measuring Range | SO2 | 0 ppm to 8 ppm |
Default Alarm 1 | 1 ppm (rising) | |
Default Alarm 2 | 2 ppm (rising) | |
Accuracy | <±5% of measured value | |
Exposure to SO2 4 ppm for 5 minutes | ||
Response Time (t62.5) | Typical 7 seconds | |
Sensor Cartridge Life Expectancy | 24 months under typical application conditions | |
Operating Temperature | 0ºC to 40ºC (32ºF to 104ºF) | |
Effect of Temperature | Zero | < ± 0.01 ppm/ºC |
Sensitivity | < ± 0.4% of measured value/ºC | |
Operating Humidity (continuous) | 15% RH to 90% RH | |
Effect of Humidity | Zero | No effect |
Sensitivity | < ± 0.5% of measured value/% RH | |
Operating Pressure | 90 kPa to 110 kPa | |
Effect of Position | No effect in typical application | |
Long Term Drift | Zero | TBA |
Sensitivity | <10% of measured value/year | |
Calibration Gas | Sulfur Dioxide (2 ppm to 6 ppm, default 4 ppm) | |
Challenge Gas (Bump Test) | Sulfur Dioxide (4 ppm) | |
Warm Up Time | < 10 minutes | |
Storage Temperature | 5°C to 25°C (41°F to 77°F) |
Each Midas-M 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 Formula | Concentration applied (ppm) | Reading (ppm SO2) |
---|---|---|---|
Acetylene | C2H2 | 10 | <30 |
Ammonia | NH3 | 20 | 0 |
Carbon Monoxide | CO | 300 | <1 |
Chlorine | CI2 | 5 | <-2 |
Ethene | C2H4 | 50 | <45 |
Hydrogen | H2 | 400 | <1 |
Hydrogen Cyanide | HCN | 10 | <5 |
Hydrogen Sulfide | H2S | 25 | <0.1 |
Iso Propanol | C3H7OH | 3500 | 1.65 |
Nitric Oxide | NO | 50 | 0 - 5 |
Nitrogen Dioxide | NO2 | 6 | <-10 |
Phosphine | PH3 | 0.6 | 1.5 |
Silane | SiH4 | 10 | 8 (Overrange) |