简单介绍： 低级碳氢化合物检测管103 hydrocarbons (lower class) c2c7，measuring range 0.05 to 0.1% 0.1 to 1.2% 1.2 to 2.4% number of pump strokes 2 1 1/2 correction factor 1/2 1 2 samp......
低级碳氢化合物检测管103 hydrocarbons 产品详情
详情介绍：
低级碳氢化合物检测管103 hydrocarbons
hydrocarbons (lower class)03c2 to c7
performance
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
1/2
1
2
samplingtime
2 minutes per pumpstroke
detectinglimit
0.01% (n=2)
colorchange
yellowish brown →greenish brown
reactionprinciple
hydorocarbon(c2 + c7) +cr6+ + h2s2o7 →cr3+
coefficient ofvariation 10% (for0.1 to 1.2 %)
shelflife 2years
correctionsfor
temperature & humidity unnecessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
carbonmonoxide
- no effect
nodiscoloration
methane,ethane
- no effect
nodiscoloration
otherhydrocarbons
- plus error
produce similarstain
othersubstance measurable with this detector tube
substance
correction factor
pump strokes
measuring range
acetylene
1.5
1/2, 1, 2
0.075 to 3.6%
butane, heptane,isobutane
0.7
1/2, 1, 2
0.035 to 1.68%
ethylene
7.0
1/2, 1, 2
0.35 to 16.8%
hexane
0.5
1/2, 1, 2
0.025 to 1.2%
isopentane
0.9
1/2, 1, 2
0.045 to 2.16%
pentane
0.75
1/2, 1, 2
0.0375 to 1.8%
propane
1.0
1/2, 1, 2
0.05 to2.4%
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
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