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.
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)