简单介绍： 二氧化碳气体检测管2l carbon dioxide，measuring range 0.13 to 0.25% 0.25 to3% 3 to 6% numberof pump strokes 2 1 1/2 correction factor 1/2 1 2 sampling time 2 minutes per，二氧......
二氧化碳气体检测管2l carbon dioxide 产品详情
详情介绍：
二氧化碳气体检测管2l carbon dioxide
carbon dioxideno.2lco2performance
measuringrange
0.13 to 0.25%
0.25 to3%
3 to 6%
numberof pumpstrokes
2
1
1/2
correctionfactor
1/2
1
2
samplingtime
2 minutes per pumpstroke
detectinglimit
0.025% (n=2)
colorchange
white → purple
reactionprinciple
co2 + n2h4 → nh2nhcooh
coefficient ofvariation 10% (for 0.25 to 1%), 5% (for 1 to 3 %)
shelflife 3years
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
- no effect
nodiscoloration
carbonmonoxide
- no effect
nodiscoloration
hydrogenchloride,
chlorine
- no effect
nodiscoloration
nitrogenoxides
- no effect
nodiscoloration
sulfurdioxide
- no effect
nodiscoloration
amines
- no effect
nodiscoloration
organicsolvents
- no effect
nodiscoloration
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
5000ppm 30000ppm -