简单介绍： 氯乙烯气体检测管131l vinyl chloride，氯乙烯检测管131l vinyl chloride，氯乙烯检测管131l ch2:chcl vinyl chloride，measuring range 0.1 to 0.2 ppm 0.2 to 3.0 ppm 3.0 to 6.6 ppm，氯乙烯气体检测管价格
氯乙烯气体检测管131l vinyl chloride 产品详情
详情介绍：
氯乙烯气体检测管131l vinyl chloride
vinyl chloride31lch2:chclperformance
measuringrange
0.1 to 0.2 ppm
0.2 to 3.0 ppm
3.0 to 6.6 ppm
number of pump strokes
4
2
1
correctionfactor
1/2
1
2.2
samplingtime
1.5 minutes per pumpstroke
detectinglimit
0.02 ppm (n=4)
colorchange
yellow → reddishbrown
reactionprinciple
ch2:chcl + cr6+ + h2so4 → hcl
hcl + base → chlorides
coefficient ofvariation 10% (for0.2 to 1 ppm), 5% (for 1 to 4 ppm)
shelflife 2years
correctionsfor
temperature & humidity temperature correction is necessary
store the tubes inthe refrigerator to keep at 10oc (50of) orbelow.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
ethylene
200 ppm
minus error
nodiscoloration
tetrachloroethylene
1/3 conc.
plus error
produce reddishbrown
trichloroethylene
1/5 conc.
plus error
produce reddishbrown
benzene,toluene
200 ppm
minus error
nodiscoloration
othersubstance measurable with this detector tube
substance
correction factor
pump strokes
measuring range
allylchloride
factor: 16
2
3.2 to 48 ppm
1,1,2,2-tetrachloroethane
factor: 10
2
2 to 30ppm
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
1ppm 500ppm 3.6 to 23%