Gastec 5L 快速二氧化硫测量探测管SO2(1.25-200ppm)

Indicator: 5 to 100 ppm
Measuring Range: 
+ 1.25 to 2.5 ppm, Number of Pump Strokes 4
+ 2.5 to 5 ppm, Number of Pump Strokes 2
+ 5 to 100 ppm, Number of Pump Strokes 1
+ 100 to 200 ppm, Number of Pump Strokes 1/2
Sampling Time:  45 seconds per pump stroke
Colour Change: Blue → Yellow
Reaction Principle: SO2 + BaCl2 +H2O → BaSO3 + 2HCl, HCl+Base → Chloride 
Coefficient of Variation: 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
1.25 to
2.5 ppm
2.5 to
5 ppm
5 to
100 ppm
100 to
200 ppm
Number of Pump Strokes
4 2 1 1/2
Correction Factor
1/4 1/2 1 2
Sampling Time 45 seconds per pump stroke
Detecting Limit 0.25 ppm (n=4)
Colour Change Blue → Yellow
Reaction Principle SO2 + BaCl2 +H2O → BaSO3 + 2HCl
HCl+Base → Chloride
Coefficient of Variation 10% (for 5 to 20 ppm), 5% (for 20 to 100 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
Carbon monoxide,
Nitric oxide
  No No
Carbon dioxide   No No
Nitrogen dioxide ≧ 1/1 + Pale purple
Hydrogen sulphide   No No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
- 0.25 ppm (2014) -

 

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