Analytical Industries Inc (AII) AII 3000 Operating Manual
Electrochemical O2 Sensors: Background Gas Compatibility
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Analysers and sensors based on the galvanic principle are suitable for the measurement of oxygen ranging from 100 PPB to
100% in a variety of background gases in a wide range of applications. It is important to establish the compatibility of the
galvanic oxygen sensor in the background gas of each application. This table is designed to assist you in selecting the correct
sensor. If the background gas of your application is not listed contact the factory at info@aii1.com for assistance.
Chemical Name Formula
Acetic Acid (vapor) H3COOH Not Recommended
Acetone (vapor) (CH3)2CO
Acetylene HCCH Suitable Suitable
Acrylonitrile C3H3N Suitable Suitable Coalescing filter
Air N/A Suitable Suitable
Ammonia NH3 Suitable Not Recommended
Argon Ar Suitable Suitable
Arsine AsH3 Not Recommended Not Recommended
Butadiene C4H6 Suitable Not Recommended
Butane C4H10 Suitable Suitable
Carbon Dioxide CO2 Suitable Suitable GRP sensors < 5,000 ppm CO2
Carbon Disulfide CS2 Suitable Suitable GPR sensors < 1,000 ppm CS2
Carbon Monoxide CO Suitable Suitable
GPR/PSR
Sensors
XLT Sensors
Special Requirements/
Comments
Coalescing filter
Coalescing filter
For ppm sensors use – H suffix on
sensor > 1000 ppm NH
3-4 month life in continuous use, longer
with spot checking
3
Chlorinated Hydrocarbons C+H+Cl Suitable Suitable
Chlorine Cl2 Not Recommended Not Recommended Interfering Signal
Chloro-fluorocarbons H+F+Cl+C Suitable Suitable
Ethyl Acetate C4H8O2 Suitable Suitable
Ethanol (EtOH) C₂H₅OH
Ethylene C2H4 Suitable Suitable
Fluorine F2 Not Recommended Not Recommended Interfering Signal
Formaldehyde (vapors) CH2O Suitable
Helium He Suitable Suitable He < 65%
Heptanes C7H16
Hexanes C6H14
Hydrocarbons H+C Suitable Suitable
Hydrochloric Acid (vapors) HCl Not Recommended
Hydrogen H2 Suitable
Suitable if H2 <
65%
Coalescing filter
Coalescing filter
GPR/PSR ppm sensors: Use -H > 1000
ppm He
Coalescing filter
Coalescing filter / 3-4 month life
Coalescing filter
GPR/PSR ppm sensors: Use -H > 1000
ppm H2
Hydrogen Cynide HCN Suitable Suitable
Hydrogen Fluoride HF Not Recommended Not Recommended
Gas Compatibility Table_V2__UK_0619 www.aii1.com
Chemical Name Formula
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Suitable
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Suitable
Suitable
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Suitable
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Suitable
GPR/PSR
Sensors
XLT Sensors
Special Requirements/
Comments
Hydrogen Sulfide H2S Suitable
Isopropyl Acetate C5H10O2 Suitable Suitable
Isopropyl Alcohol (IPA) C3H8O
Methane CH4 Suitable Suitable
Methanol MeOH (vapors) CH3OH Suitable Suitable Coalescing filter
Methanol (vapors) CH4O
Methyl Iodide (vapors) CH3I
MTBE (vapors) C5H12O
Nitric Oxide NO
Nitrogen N2 Suitable Suitable
Nitrogen Dioxide NO2 Suitable Suitable
Nitrous Oxide N2O Suitable Suitable Limit of 100ppm N2O
NOx NO, NO2 Suitable Suitable Limit of 100ppm NOX
Octoflurocyclobutane C4F8 Suitable Suitable
> 10 ppm H2S, remove with factory
scrubber
Coalescing filter
Coalescing filter
Coalescing filter
Coalescing filter
Limit of 100ppm NO
Percentage O2 measurements only with
<100 ppm N02
Ozone O3 Not Recommended Not Recommended
Pentane (vapors) C5H12
Phosgene CCl2O Not Recommended Not Recommended
Phosphane PH3 Not Recommended Not Recommended
Propane C3H
Propelene Aldehyde (vapors) C3H4O Suitable
Propionic Acid (vapors) C3H6O2 Not Recommended
Propylene C3H6 Suitable Suitable
Silane SiH4 Not Recommended Not Recommended
Styrene C8H8 Suitable Suitable
Sufuric Acid (vapors) H2SO4 Not Recommended Suitable
Sulfur Dioxide SO2 Suitable Suitable
Sulfur Hexafluride SF6 Suitable Suitable Limited life 3 to 4 months
Tetrafuoromethane (vapors) CF4
Tetrahydrofurane (vapors) C4H8O
Suitable Suitable
8
Coalescing filter
Coalescing filter
Coalescing filter
> 10 ppm H2SO4, remove with factory
scrubber
> 10 ppm SO2, remove with factory
scrubber
Coalescing filter
Coalescing filter
Toluene (vapors) C7H8
Trimethylaluminum (vapors) (CH3)6Al2
Turpentine (vapors) (C5H8)n
Vinyl Acetate (vapors) C4H6O2
Vinyl Chloride (vapors) C2H3Cl Suitable Suitable Coalescing filter
Gas Compatibility Table_V2__UK_0619 www.aii1.com
Coalescing filter
Coalescing filter
> 10 ppm C5H8, coalescing filter
Coalescing filter
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