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Hikvision DS-7604NI-M1/4P 4-ch 1U 4K NVR

User Manual - Page 134

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Table 24-2 Common Categories and Sources of Corrosive Gases
Category Primary Sources
H
2
S (Hydrogen Sulde) Geothermal emissions, microbial acvity, oil manufacturing,
wood corrosion, wastewater treatment, etc.
SO
2
(Sulfur Dioxide), SO
3
(Sulfur
Trioxide)
Coal combuson, petroleum products, automobile exhaust,
smelng ore, sulfuric acid manufacturing, tobacco combuson,
etc.
S (Sulfur) Foundry shops, sulfur manufacturing, etc.
HF (Hydrogen Fluoride) Ferlizer manufacturing, aluminum manufacturing, ceramic
manufacturing, steel manufacturing, electronic equipment
manufacturing, mineral combuson, etc.
NO
X
(Nitrogen Oxides) Automobile exhaust, oil combuson, microbial acvity, chemical
industry, etc.
NH
3
(Ammonia) Microbial acvity, sewage, ferlizer manufacturing, geothermal
emissions, etc.
CO (Carbon Monoxide) Combuson, automobile exhaust, microbial acvity, tree decay,
etc.
Cl
2
(Chlorine), ClO
2
(Chlorine
Dioxide)
Chlorine manufacturing, aluminum manufacturing, zinc
manufacturing, waste decomposion, etc.
HCl (Hydrogen Chloride) Automobile exhaust, combuson, forest res, marine process
polymer combuson, etc.
HBr (Hydrobromic Acid), HI
(Hydroiodic Acid)
Automobile exhaust, etc.
O
3
(Ozone) Atmospheric opcal processes (mostly including nitric oxide and
hydrogen peroxide), etc.
C
n
H
n
(Alkane) Automobile exhaust, tobacco burning, animal waste, sewage,
tree decay, etc.
Network Video Recorder User Manual
107
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