Gastec 45S 快速硫化氢和二氧化硫测量探测管 H2S 和 SO2(0.25~20 ppm(SO2),1.25~120ppm(H2S))

Indicator: 
+ Tube SO2: 0.5~10ppm
+ Tube H2S: 5~60ppm
Measuring Range SO2 tube
+ 0.25~5ppm, Number of Pump Strokes 2
+ 0.5~10ppm, Number of Pump Strokes 1
+ 10~20ppm, Number of Pump Strokes 1/2
Measuring Range H2S tube
+ 1.25~2.5ppm, Number of Pump Strokes 2
+ 2.5~60ppm, Number of Pump Strokes 1
+ 60~120ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minute per pump stroke
Colour Change: 
+ TubeSO2: Yellowish green → Yellow
+ Tube H2S: White → Brown 
Reaction Principle: 
+ Tube SO2: SO2 + BaCl2+ H2O → BaSO3 + 2HCl, HCl + Base → Chloride
+ Tube H2S: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation: 
+ Tube SO2: 10% (for 0.5 to 2 ppm), 5% (for 2 to 10 ppm)
+ Tube H2S: 10% (for 2.5 to 10 ppm), 5% (for 10 to 60 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Name of Gas
SO2
tube
H2S
tube
SO2
tube
H2S
tube
SO2
tube
H2S
tube
Measuring Range
0.25 to
0.5
1.25 to
2.5
0.5 to
10
2.5 to
60
10 to
20
60 to
120
Number of Pump Strokes
2 2 1 1 1/2 1/2
Correction Factor
1/2 1/2 1 1 2 2
Sampling Time 2 minute per pump stroke
Detecting Limit 0.05 ppm (n=2)
Colour Change SO2tube : Yellowish green → Yellow
H2S tube : White → Brown
Reaction Principle SO2tube:
SO2 + BaCl2+ H2O → BaSO3 + 2HCl
HCl + Base → Chloride

H2S tube:
H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation SO2 tube: 10% (for 0.5 to 2 ppm), 5% (for 2 to 10 ppm)
H2S tube:10% (for 2.5 to 10 ppm), 5% (for 10 to 60 ppm)
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 colour by itself to
SO2 tube H2S tube SO2 tube H2S tube
Nitrogen dioxide 5 ppm + No Pale purple No
Nitrogen monoxide
Mercaptans
Carabon monoxide
  No No No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
SO2:--(2014)
H2S
:1 ppm (2014)
SO2:0.25 ppm (2014)
H2S
:5 ppm (2014)
H2S : 4.0 to 44%
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