Description
Honeywell MIDAS Sensor Cartridge for Oxygen (O2) 0.2-25% v/v, 3 year warranty
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 | Oxygen (O2) | |
---|---|---|
Cartridge Part Number | MIDAS-L-O2S | 3 year warranty |
Sensor Technology | 3 electrode electrochemical cell | |
Measuring Range | O2 | 0 – 25% v/v |
Minimum Alarm 1 Set Point | 5% v/v | |
Repeatability | < ± 0.1% v/v | |
Linearity | < ± 0.2% v/v | |
Response Time t62.5 | < 10 seconds | |
Sensor Cartridge Life Expectancy | ≥ 36 months under typical application conditions | |
Operating Temperature | 0°C to +40°C (32°F to 104°F) | |
Effect of Temperature | Zero | TBA |
Sensitivity | < ± 0.3% of measured value / °C | |
Operating Humidity (continuous) | 15 – 90% rH | |
Effect of Humidity | Zero | Follows actual concentration of O2 present |
Sensitivity | (eg. 20.9% v/v @ 30% rH, 20.04% v/v @ 99% rH / 40°C) | |
Operating Pressure | 70 – 110kPa | |
Effect of Position | No effect in typical application | |
Long Term Drift | Zero | No Drift |
Sensitivity | <5% signal loss over operating life | |
Calibration Gas | Oxygen (O2) | |
Challenge Gas (Bump Test) | Air mixture | |
Warm Up Time | < 30 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 (% O2) |
---|---|---|---|
Carbon Dioxide | CO2 | Enhance O2 reading by 0.3% / % CO2 | |
Hydrogen | H2 | 100% v/v | -9 |
Methane | CH4 | 100% v/v | No response |
Nitrogen Dioxide | NO2 | 25 ppm in air | No response |