简单介绍： 硫化氢气体检测管4hp hydrogen sulphide h2s，measuring range 0.25 to 0.5% 0.5 to 10 % 10 to 20 %硫化氢气体检测管4hp hydrogen sulphide h2s，硫化氢气体检测管价格
硫化氢气体检测管4hp hydrogen sulphide 产品详情
详情介绍：
硫化氢气体检测管4hp hydrogen sulphide
hydrogen sulphide no.4hph2sperformance
measuring range
0.25 to 0.5%
0.5 to 10 %
10 to 20 %
number of pump strokes
2
1
1/2
correction factor
1/2
1
2
sampling time
3 minutes per pump stroke
detecting limit
0.1% (n=2)
color change
pale blue → blackish brown
reaction principle
h2s + cuso4 → cus + h2so4
coefficient of variation 10% (for 0.5 to 3 %), 5% (for 3 to 10 %)
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
ammonia
- produces blackish brown and dark blue color
produces dark blue stain
sulfur dioxide
2.5%
minus error
no discoloration
mercaptans
5 %
plus error
no discoloration
other substance measurable with this detector tube
calibration gas generation high pressure gas cylinder method
tlv-twa tlv-stel explosive range
10ppm 15ppm 4.0 to 44%