Midas® is a registered trademark of Honeywell Analytics.
As with all electrochemical sensor cells, dramatic output changes in reported concentrations can be
expected under rapidly changing environmental conditions. Please ensure sensors are located in
areas not prone to sudden changes in humidity and temperature.
Actual readings may be affected by flow rates (although Midas® automatically controls flow rates
within specified ranges) and absorption on tubing and other gas path surfaces.
All sensors are shipped pre-calibrated to traceable national standards. Dependent on actual
operating conditions and overall exposure to gases, each sensor may not require in-field calibration
for up to 24 months subject to any requirements to calibrate from local regulations or site practices.
Calibration and challenge gases should be from a certified and reliable source.

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Gas Measured Phosphorous Oxychloride (POCl3)
Cartridge Part Number MIDAS-S-POC 1 year standard warranty
MIDAS-E-POC 2 year extended warranty
Sensor Technology 3 electrode electrochemical cell
Measuring Range (ppm) POCl3 0 – 0.4ppm
Minimum Alarm 1 Set Point 0.050ppm
Lower Detectable Limit (LDL) 0.036ppm
Repeatability < ± 20% of measured value
Linearity < ± 20% of measured value
Response Time t62.5 < 200 seconds
Sensor Cartridge Life Expectancy ≥ 24 months under typical application conditions
Operating Temperature 0oC to +40oC (32oF to 104oF)
Effect of Temperature Zero < ± 0.0003ppm / oC (0oC to 20oC)
< ± 0.0017ppm / oC (20oC to 40oC)
Sensitivity < ± 0.4% of measured value / oC
Operating Humidity (continuous) 20 – 75% rH
Effect of Humidity
Zero < ± 0.00067ppm / % rH
Sensitivity < ± 1% of measured value / % rH
Operating Pressure 90 – 110kPa
Effect of Position No effect in typical application
Long Term Drift
Zero Negligible
Sensitivity < ± 15% of measured value / year
Calibration Gas Hydrogen Chloride (HCl)
Challenge Gas (Bump Test) Chlorine (Cl2)
Warm Up Time < 20 minutes
Storage Temperature +5°C to +25°C (+41°F to +77°F)

Ammonia 0-100 ppm MIDAS-S-NH3 MIDAS-E-NH3
Arsine 0-0.2 ppm MIDAS-S-ASH MIDAS-E-ASH
Boron Trichloride 0-8 ppm MIDAS-S-HCL MIDAS-E-HCL
Boron Trifluoride 0-8 ppm MIDAS-S-HFX MIDAS-E-HFX
Bromine 0-0.4 ppm MIDAS-S-BR2 MIDAS-E-BR2
Chlorine 0-2 ppm MIDAS-S-HAL MIDAS-E-HAL
Chlorine Dioxide 0-0.4 ppm MIDAS-S-BR2 MIDAS-E-BR2
Chlorine Trifluoride 0-0.8 ppm MIDAS-S-SF4 MIDAS-E-SF4
Carbon Dioxide 0-2.0% vol MIDAS-S-CO2 MIDAS-E-CO2
Carbon Monoxide 0-100 ppm MIDAS-S-COX MIDAS-E-COX
Diborane 0-0.4 ppm MIDAS-S-HYD MIDAS-E-HYD
Dichlorosilane 0-8 ppm MIDAS-S-HCL MIDAS-E-HCL
Disilane 0-20 ppm MIDAS-S-SHX MIDAS-E-SHX
Fluorine 0-4 ppm MIDAS-S-HAL MIDAS-E-HAL
Germane 0-0.8 ppm MIDAS-S-HYD MIDAS-E-HYD
Hydrogen 1 0-1000 ppm MIDAS-S-H2X MIDAS-E-H2X
Hydrogen 0-100% LEL 1 MIDAS-S-LEL MIDAS-E-LEL
Hydrogen Bromide 0-8 ppm MIDAS-S-HCL MIDAS-E-HCL
Hydrogen Chloride 0-8 ppm MIDAS-S-HCL MIDAS-E-HCL
Hydrogen Cyanide 0-20 ppm MIDAS-S-HCN MIDAS-E-HCN
Hydrogen Fluoride 0-12 ppm MIDAS-S-HFX MIDAS-E-HFX
Hydrogen Selenide 0-0.4 ppm MIDAS-S-HSE MIDAS-E-HSE
Hydrogen Sulfide 0-40 ppm MIDAS-S-H2S MIDAS-E-H2S
Methane 0-100% LEL 1 MIDAS-S-LEL MIDAS-E-LEL
Nitric Oxide 0-100 ppm MIDAS-S-NOX MIDAS-E-NOX
Nitrogen Dioxide 0-12 ppm MIDAS-S-NO2 MIDAS-E-NO2
Nitrogen Trifluoride 0-40 ppm MIDAS-S-HFX MIDAS-E-HFX
Oxygen 0-25% v/v MIDAS-S-O2X MIDAS-E-O2X
Ozone 0-0.4 ppm MIDAS-S-O3X MIDAS-E-O3X
Phosphine 0-1.2 ppm MIDAS-S-PH3 MIDAS-E-PH3
Phosphorous Oxychloride 0-0.8 ppm MIDAS-S-POC MIDAS-E-POC
Silane 0-20 ppm MIDAS-S-SHX MIDAS-E-SHX
Silane low level 0-2 ppm MIDAS-S-SHL MIDAS-E-SHL
Sulfur Dioxide 0-8 ppm MIDAS-S-SO2 MIDAS-E-SO2
Sulfur Tetrafluoride 0-0.8 ppm MIDAS-S-SF4 MIDAS-E-SF4
TEOS Tetraethyl Orthosilicate 0-40 ppm MIDAS-S-TEO MIDAS-E-TEO
Tungsten Hexafluoride 0-12 ppm MIDAS-S-HFX MIDAS-E-HFX