简单介绍： 氟化氢气体检测管17l hydrogen fluoride，measuring range 0.09 to 0.2 ppm 0.2 to 10 ppm 10 to 72 ppm number of pump strokes 5 3 1 correction factor 0.45 1 7.2 sampling time氟......
氟化氢气体检测管17l hydrogen fluoride 产品详情
详情介绍：
氟化氢气体检测管17l hydrogen fluoride
hydrogen fluoride 7lhfperformance
measuring range
0.09 to 0.2 ppm
0.2 to 10 ppm
10 to 72 ppm
number of pump strokes
5
3
1
correction factor
0.45
1
7.2
sampling time
1 minute per pump stroke
detecting limit
0.05 ppm (n=5)
color change
yellow → brown
reaction principle
hydrogen fluoride reacts with indicator to produce reddish brown stain.
coefficient of variation 10% (for 0.5 to 5 ppm), 5% (for 5 to 20 ppm)
shelf life 2years
corrections for
temperature & humidity humidity correction is necessary
store the tubes at cool and dark place.
possible coexisting substances and their interferences (note)
substance
concentration
interference
change color by itself
nitric acid
1/5
+
reddish purple
hydrogen chloride
1/2
+
reddish purple
nitrogen dioxide no
no
other substance measurable with this detector tube
calibration gas generation permeation tube method
tlv-twa tlv-stel explosive range
0.5ppm c2 ppm -