*气体检测管12m hydrogen cyanide 产品详情
详情介绍：
*气体检测管12m hydrogen cyanide hydrogen cyanide 2m hcnperformance
measuring range
17 to 50 ppm
50 to 800 ppm
800 to 2400 ppm
number of pump strokes
2
1
1/2
correction factor
1/3
1
3
sampling time
1 minute per pump stroke
detecting limit
1 ppm (n=2)
color change
yellow → red
reaction principle
2hcn + hgcl2 → hg(cn)2 + 2hcl
hcl + base → chloride
coefficient of variation 10% (for 50 to 200 ppm), 5% (for 200 to 800 ppm)
shelf life 3 years
corrections for
temperature & humidity unnecessary
store the tubes at cool and dark place.
possible coexisting substances and their interferences (note)
substance
concentration
interference
change color by itself
hydrogen sulfide
500 ppm
plus error
red discoloration
sulfur dioxide
500 ppm
plus error
red discoloration
other substance measurable with this detector tube
calibration gas generation permeation tube method
tlv-twa tlv-stel explosive range
- c 4.7 ppm 5.6 to 40%