Description
Honeywell Midas-M Hydrogen (H2) Sensor, 0-1000 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.
Gas Measured | Hydrogen (H2) | |
---|---|---|
Cartridge Part Number | MMS-G2 | |
Sensor Technology | 3 electrode electrochemical cell | |
Measuring Range | H2 | 0 ppm to 1000 ppm |
Default Alarm 1 | 125 ppm (rising) | |
Default Alarm 2 | 250 ppm (rising) | |
Accuracy | <±5% of measured value | |
Exposure to H2 500 ppm for 5 minutes | ||
Response Time (t62.5) | Typical 41 seconds | |
Sensor Cartridge Life Expectancy | 24 months under typical application conditions | |
Operating Temperature | 0ºC to 40ºC (32ºF to 104ºF) | |
Effect of Temperature | Zero | <±0.31 ppm/ºC |
Sensitivity | <±1.5% of measured value/ºC | |
Operating Humidity (continuous) | 15% RH to 90% RH | |
Effect of Humidity | Zero | <±0.1 ppm/% RH |
Sensitivity | <±0.1% of measured value/% RH | |
Operating Pressure | 90 kPa to 110 kPa | |
Effect of Position | No effect in typical application | |
Long Term Drift | Zero | No drift |
Sensitivity | <12% of measured value/6 month | |
Calibration Gas | Hydrogen (250 ppm to 750 ppm, default 500 ppm) | |
Challenge Gas (Bump Test) | Hydrogen (500 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 H2) |
---|---|---|---|
Ammonia | NH3 | 100 | 0 |
Arsine | AsH3 | 0.2 | 0 |
Carbon Dioxide | CO2 | 1000 | 0 |
Carbon Monoxide | CO | 100 | 150 |
Chlorine | Cl2 | 1 | 0 |
Chlorine Dioxide | ClO2 | 1 | 0 |
Hydrogen Cyanide | HCN | 20 | 0 |
Hydrogen Sulfide | H2S | 20 | 4 |
Iso Propanol | C3H7OH | 1100 | Yes |
Methane | CH4 | 1% | 0 |
Nitrogen Dioxide | NO2 | 10 | -40 |
Ozone | O3 | 0.25 | 0 |
Sulfur Dioxide | SO2 | 5 | 0 |