简单介绍： 二氧化碳气体检测管2lc carbon dioxide，measuring range 100 to 2000 ppm 2000 to 4000 ppm number of pump strokes 1 1/2 correction factor 1 2 sampling time 2 minutes，二氧化碳气体检测管......
二氧化碳气体检测管2lc carbon dioxide 产品详情
详情介绍：
二氧化碳气体检测管2lc carbon dioxide
carbon dioxideno.2lcco2performance
measuring range
100 to 2000ppm
2000 to 4000ppm
number of pump strokes
1
1/2
correction factor
1
2
sampling time
2 minutes per pumpstroke
detecting limit
20 ppm (n=1)
color change
pale red →yellow
reaction principle
co2+ 2koh → k2co3+ h2o
coefficient ofvariation 10% (for 100 to 600ppm), 5% (for 700 to 2000 ppm)
shelflife 2years
correctionsfor
temperature & humidity unnecessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
ammonia
1000 ppm
no effect
no discoloration by1000ppm
hydrogenchloride
500 ppm
no effect
no discoloration by500 ppm
chlorine
20 ppm
no effect
no discoloration by10 ppm
hcn,h2s
100 ppm
no effect
no discoloration by50 ppm
sulfurdioxide
25 ppm
no effect
no discoloration by25 ppm
nitorgendioxide
20 ppm
no effect
no discoloration by20 ppm
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
5000ppm 30000ppm -