Honeywell MIDAS Sensor Cartridge for Phosphine (PH3) 110-1200 ppb



Honeywell MIDAS Sensor Cartridge for Phosphine (PH3) 110-1200 ppb

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 MeasuredPhosphine (PH3)
Cartridge Part NumberMIDAS-E-PH32 year extended warranty
Sensor Technology3 electrode electrochemical cell
Measuring Range (ppm)PH30 – 1.2 ppm
Minimum Alarm 1 Set Point0.15 ppm
Repeatability< ± 5% of measured value
Linearity< ± 10% of measured value
Response Time t62.5≤ 2 seconds
Sensor Cartridge Life Expectancy≥ 24 months under typical application conditions
Operating Temperature0°C to +40°C (32°F to 104°F)
Effect of Temperature< ± 0.001ppm / °C (0°C to 20°C)
Zero< ± 0.003 ppm / °C (20°C to 40°C)
Sensitivity< ± 0.6% of measured value / °C
Operating Humidity (continuous)10 – 90% rH
Effect of HumidityZero< 0.0015 ppm / % rH
Sensitivity< ± 1% of measured value / % rH
Operating Pressure90 – 110kPa
Effect of PositionNo effect in typical application
Long Term DriftZero< ± 0.02 ppm / year
Sensitivity< ± 10% of measured value / year
Calibration GasPhosphine (PH3)
Challenge Gas (Bump Test)Phosphine (PH3)
Warm Up Time< 20 minutes
Storage Temperature+5°C to +25°C (+41°F to +77°F)
Cross Sensitivities

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 / VaporChemical FormulaConcentration Applied (ppm)Reading (ppm PH3)
Carbon MonoxideCO2000< 0.01
ChlorineCl21- 0.07
EthanolC2H5OH2000< 0.01
HydrogenH25000< 0.01
Hydrogen ChlorideHCl10< 0.01
Hydrogen FluorideHF10< 0.01
Hydrogen SulfideH2S0.50.07
Iso PropanolC3H7OH20000
Nitrogen DioxideNO28- 0.86
Sulfur DioxideSO2500.55

Additional information

Weight 1 lbs