Description
Honeywell MIDAS Sensor Cartridge for Diborane (B2H6) 0.036-0.4 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 | Diborane (B2H6) | |
---|---|---|
Cartridge Part Number | MIDAS-E-B2H | 2 year extended warranty |
Sensor Technology | 3 electrode electrochemical cell | |
Measuring Range (ppm) | B2H6 | 0 – 0.4 ppm |
Minimum Alarm 1 Set Point | 0.050 ppm | |
Repeatability | < ± 2% of measured value | |
Linearity | < ± 10% of Full Scale | |
Response Time t62.5 | < 15 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 | < ± 0.009 ppm / °C (at 0°C to 20°C) | |
Zero | < ± 0.0002ppm / °C (0°C to 40°C) | |
Sensitivity | < ± 1% of measured value / °C | |
Operating Humidity (continuous) | 10 – 95% rH (non-condensing) | |
Effect of Humidity | Zero | Initial short term drift at abrupt RH change (< 0.0075ppm / % rH) |
Sensitivity | < ± 0.5% of measured value / % rH | |
Operating Pressure | 90 – 110kPa | |
Effect of Position | No effect in typical application | |
Long Term Drift | Zero | No Drift |
Sensitivity | < 5% of measured value / 6 months | |
Calibration Gas | Diborane (B2H6) | |
Challenge Gas (Bump Test) | Phosphine (PH3) | |
Warm Up Time | < 20 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 B2H6) |
---|---|---|---|
Ammonia | NH3 | 108 | <0.1 |
Arsine | AsH3 | 0.2 | 0.1 |
Carbon Dioxide | CO2 | 5,000 | 0 |
Carbon Monoxide | CO | 85 | 0 |
Chlorine | Cl2 | 0.85 | -0.15 |
Disilane | Si2H6 | 0.27 | 0.12 |
Germane | GeH4 | 0.94 | 0.1 |
Hydrogen | H2 | 3100 | 0 |
Hydrogen Chloride | HCl | 3.9 | 0.26 |
Hydrogen Cyanide | HCN | 12 | 0.35 |
Hydrogen Fluoride | HF | 7.2 | 0 |
Hydrogen Selenide | H2Se | 0.8 | 0.2 |
Hydrogen Sulfide | H2S | 1.8 | 0.75 |
Iso Propanol | C3H7OH | 20,000 | <0.05 |
Methane | CH4 | 18,000 | 0 |
Nitrogen Dioxide | NO2 | 10.1 | -1.5 |
Phosphine | PH3 | 0.3 | 0.23 |
Silane | SiH4 | 2.0 | 0.18 |
Sulfur Dioxide | SO2 | 2 | 0.3 |