一氧化碳?xì)怏w檢測(cè)管1La Carbon monoxide    的詳細(xì)介紹
Measuring Range
8 to 12.5 ppm
12.5 to 25 ppm
25 to 500 ppm
500 to 1000ppm
Number of Pump Strokes
3
2
1
1/2
Correction Factor
1/3
1/2
1
2
Sampling Time
2 minutes per pumpstroke
Detecting Limit
2 ppm (n=3)
Color Change
Yellow → Blackishbrown
Reaction Principle
CO +Na2Pd(SO3)2  → Pd + CO2  + SO2+Na2SO3
Coefficient ofVariation10% (for25 to 100 ppm), 5% (for 100 to 500 ppm)ShelfLife3YearsCorrectionsforSubstance
Concentration
Interference
Change color by itself
Acetylene
1/50 time
Plus error
Discolors darkbrown
Ethylene
2000 ppm
No effect
Discolors whole layerto brown
Hydrogen
5000 ppm
Plus error
Dark brown (wholelayer)(1%)
Sulfurdioxide
1/10 time
Plus error
Discolors blackishbrown
Nitrogendioxide
40 ppm
Plus error
60 ppmNO2  gives redstain
Carbondisulfide
1/50 time
Plus error
Discolors darkbrown
Halogens
1/5 time
Plus error
Discolors darkbrown
Mercaptans
1/5 time
Plus error
Discolors darkbrown
Hydrogensulfide
1/5 time
Plus error
Discolors darkbrown
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