Chemical Compatibility - GasTech D-Guard2S Operator's Manual

21. APPENDIX D:

21.1. CHEMICAL COMPATIBILITY

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When installing D-Guard , it is important to be aware of the possible effects of chemicals on the construction of the
detector. Such effects may not be immediately noticeable, but may over time cause significant deterioration of the
enclosure. Even relatively small amounts of non-compatible substances can cause such degradation and should be
considered. Some examples of material deterioration are:- discolouration, rust-like deposits and distortion of the
enclosure shape. Other changes may not be visible, such as the characteristic strength of the enclosure material
changing, thus rendering the housing brittle. The following table lists typical performance for the enclosure material
for exposure to some common substances, including the gases that the detector may be installed to measure.
The performance of the enclosure materials with exposure to these substances will depend on the nature of the
application, therefore the information given below is for guidance only.
Substance / Gas
Ammonia 10%v/v Severe reaction
Benzene Excellent
Butane Excellent
Calcium hyperchlorite Severe reaction
Carbon Monoxide Excellent
Carbon Tetrachloride Excellent
Chlorine OK
Diesel Fuel Excellent
Ethane Excellent
Ethanol Excellent
Ethyl Alcohol. Excellent
Ethylene Oxide Severe reaction
Fluorine Severe reaction
Gasoline Excellent
Hexane Excellent
Hydrogen Sulphide OK
Jet Fuel Excellent
Kerosene Excellent
Oxygen Excellent
Sulphur Dioxide OK
Toluene OK
Excellent = no effects on material composition OK = Can be used with possible effects as noted
Severe reaction = likely to become damaged if exposed to high concentrations for prolonged periods.
Reaction
PPM levels of ammonia will give no problems
High concentrations of liquid chlorine may cause damage. PPM levels will give no problems.
PPM levels will give no problems.
PPM levels will give no problems.
Possible discolouration
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D-Guard
Notes
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