简单介绍： 硫化氢检测管4ht hydrogen sulphide h2s，measuring range 1 to 2 % 2 to 20 % 20 to 40 % number of pump strokes 2 1 1/2 correction factor 1/2 1 2 sampling time 1 minute per......
硫化氢检测管4ht hydrogen sulphide 产品详情
详情介绍：
硫化氢检测管4ht hydrogen sulphide
hydrogen sulphide no.4hth2sperformance
measuring range
1 to 2 %
2 to 20 %
20 to 40 %
number of pump strokes
2
1
1/2
correction factor
1/2
1
2
sampling time
1 minute per pump stroke
detecting limit
0.2% (n=2)
color change
pale blue → blackish brown
reaction principle
h2s + cuso4 → cus + h2so4
coefficient of variation 10% (for 2 to 6 %), 5% (for 6 to 20 %)
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
sulfur dioxide
5%
minus error
no discoloration
mercaptans
10%
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%