Description
Honeywell MIDAS Sensor Cartridge for Ammonia (NH3) 9-100 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 Measured | Ammonia (NH3) | |
---|---|---|
Cartridge Part Number | MIDAS-E-NH3 | 2 year extended warranty |
Sensor Technology | 3 electrode electrochemical cell | |
Measuring Range (ppm) | NH3 | 0 – 100 ppm |
Minimum Alarm 1 Set Point | 12.5 ppm | |
Repeatability | < ± 5% of measured value | |
Linearity | < ± 2% of measured value | |
Response Time t62.5 | < 10 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 | < ± 0.1ppm / °C | |
Zero | < ± 1% of measured value / °C (0°C to 25°C) | |
Sensitivity | < ± 0.2% of measured value / °C (25°C to 40°C) | |
Operating Humidity (continuous) | 15 – 90% rH | |
Effect of Humidity | Zero | TBA |
Sensitivity | TBA | |
Operating Pressure | 90 – 110kPa | |
Effect of Position | No effect in typical application | |
Long Term Drift | Zero | TBA |
Sensitivity | < ± 3% of measured value / 6 months | |
Calibration Gas | Ammonia (NH3) | |
Challenge Gas (Bump Test) | Ammonia (NH3) | |
Warm Up Time | < 10 minutes | |
Storage Temperature | +5°C to +25°C (+41°F to +77°F) |
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 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 |