简单介绍： 氨气气体检测管3m ammonia nh3，measuring range 10 to 50 ppm 50 to 500 ppm 500 to 1000 ppm number of pump strokes 2 to 5 1 1/2 correction factor 1/2 to 1/5 1 2 sampling ti......
氨气气体检测管3m ammonia nh3 产品详情
详情介绍：
氨气气体检测管3m ammonia nh3 ammonia no.3mnh3
performance
measuringrange
10 to 50 ppm
50 to 500 ppm
500 to 1000ppm
number of pump strokes
2 to 5
1
1/2
correctionfactor
1/2 to 1/5
1
2
samplingtime
45 seconds per pumpstroke
detectinglimit
2 ppm (n=5)
colorchange
purple →yellow
reactionprinciple
3nh3 + h3po4 → (nh4)3po4
coefficient ofvariation 5% (for50 to 500 ppm)
shelflife 3years
correctionsfor
temperature & humidity unnecessary
store the tubes in dark and coolplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
diamines
1/8
plus error
produce yellowstain
monoamines
1/15
plus error
produce yellowstain
carbondioxide
1%
minus error
nodiscoloration
othersubstance measurable with this detector tube
substance
correctionfactor
pumpstrokes
measuringrange
trimethylamine
0.5
1
25 to 250ppm
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
25ppm 35ppm 15 to 28%