MeasuringRange
0.05 to 0.1%
0.1 to 1.2%
1.2 to 2.4%
Number of Pump Strokes
2
1
1/2
CorrectionFactor
SamplingTime
2 minutes per pumpstroke
DetectingLimit
0.01% (n=2)
ColorChange
Yellowish brown →Greenish brown
ReactionPrinciple
Hydorocarbon(C2 + C7) +Cr6+ + H2S2O7 →Cr3+
Substance
Concentration
Interference
Change color by itself
Carbonmonoxide
No effect
Nodiscoloration
Methane,Ethane
Otherhydrocarbons
Plus error
Produce similarstain
Correction Factor
Pump Strokes
Measuring Range
Acetylene
1.5
1/2, 1, 2
0.075 to 3.6%
Butane, Heptane,Isobutane
0.7
0.035 to 1.68%
Ethylene
7.0
0.35 to 16.8%
Hexane
0.5
0.025 to 1.2%
Isopentane
0.9
0.045 to 2.16%
Pentane
0.75
0.0375 to 1.8%
Propane
1.0
0.05 to2.4%