简单介绍： 一氧化碳气体检测管1la carbon monoxide，measuring range 8 to 12.5 ppm 12.5 to 25 ppm 25 to 500 ppm 500 to 1000ppm number of pump strokes，一氧化碳气体检测管价格，一氧化碳气体检测管1la carbon mon......
一氧化碳气体检测管1la carbon monoxide 产品详情
详情介绍：
一氧化碳气体检测管1la carbon monoxide
carbonmonoxidelacoperformance
measuring range
8 to 12.5 ppm
12.5 to 25 ppm
25 to 500 ppm
500 to 1000ppm
number of pump strokes
3
2
1
1/2
correction factor
1/3
1/2
1
2
sampling time
2 minutes per pumpstroke
detecting limit
2 ppm (n=3)
color change
yellow → blackishbrown
reaction principle
co +na2pd(so3)2 → pd + co2 + so2+na2so3
coefficient ofvariation 10% (for25 to 100 ppm), 5% (for 100 to 500 ppm)
shelflife 3years
correctionsfor
temperature & humidity temperature correction is necessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
acetylene
1/50 time
plus error
discolors darkbrown
ethylene
2000 ppm
no effect
discolors whole layerto brown
hydrogen
5000 ppm
plus error
dark brown (wholelayer)(1%)
sulfurdioxide
1/10 time
plus error
discolors blackishbrown
nitrogendioxide
40 ppm
plus error
60 ppmno2 gives redstain
carbondisulfide
1/50 time
plus error
discolors darkbrown
halogens
1/5 time
plus error
discolors darkbrown
mercaptans
1/5 time
plus error
discolors darkbrown
hydrogensulfide
1/5 time
plus error
discolors darkbrown
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
25 ppm - 12.5 to 74%