Description
Honeywell Midas-M Ammonia (NH3) Sensor, 0-100 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 NH3 sensor CANNOT be combined with an HCl, Cl2, or HF sensor in a complete Midas-M Sensor Cartridge Package.
Gas Measured | Ammonia (NH3) | |
---|---|---|
Cartridge Part Number | MMS-A2 | |
Sensor Technology | 3 electrode electrochemical cell | |
Measuring Range | NH3 | 0 ppm to 100 ppm |
Default Alarm 1 | 12.5 ppm (rising) | |
Default Alarm 2 | 25 ppm (rising) | |
Accuracy | <±5% of measured value | |
Exposure to NH3 50 ppm for 5 minutes | ||
Response Time (t62.5) | Typical 15 seconds | |
Sensor Cartridge Life Expectancy | 24 months under typical application conditions | |
Operating Temperature | 0ºC to 40ºC (32ºF to 104ºF) | |
Effect of Temperature | Zero | <±0.1 ppm/ºC |
Sensitivity | <±0.6% of measured value/ºC | |
Operating Humidity (continuous) | 15% RH to 90% RH | |
Effect of Humidity | Zero | <±0.02 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 | TBA |
Sensitivity | <5% of measured value/6 months | |
Calibration Gas | Ammonia (25 ppm to 75 ppm, default 50 ppm) | |
Challenge Gas (Bump Test) | Ammonia (50 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 NH3) |
---|---|---|---|
Arsine | AsH3 | 0.2 | 0.07 |
Carbon Dioxide | CO2 | 5000 | 0 |
Carbon Monoxide | CO | 100 | 0 |
Chlorine | Cl2 | 1 | 0 |
Ethanol | C2H5OH | 1000 | 0 |
Hydrogen | H2 | 10000 | 0 |
Hydrogen Chloride | HCl | 10 | -4 |
Hydrogen Sulfide | H2S | 20 | 2 |
Iso Propanol | C3H7OH | 1000 | 0 |
Methanol | CH3OH | 1000 | 0 |
Nitrogen Dioxide | NO2 | 10 | -0.5 |
Phosphine | PH3 | 300 | 0 |
Sulfur Dioxide | SO2 | 20 | -40 |