Gastec 5D 二氧化硫被动发现管SO2(0.2~100ppm)

Indicator: 2~100ppm
Measuring Range: 0.2~100ppm
Sampling Hours: 1~10 hours
Colour Change: Green → Yellow
Reaction Principle: SO2 + BaCl2 + H2O → BaSO3 + 2HCl, HCl + Base → Chloride 
Coefficient of Variation: 10% (for 2 to 10 ppm-hr),5% (for 10 to 100 ppm-hr)
Nr. of tests: 10

Detail

Catalog

sulphur dioxide

  NO.5D
SO2
Performance
Measuring Range 0.2 to 100 ppm
Sampling Hours 1 to 10 hours
Detecting Limit 0.1 ppm (10 hours)
Colour Change Green → Yellow
Reaction Principle SO2 + BaCl2 + H2O → BaSO3 + 2HCl
HCl + Base → Chloride
Coefficient of Variation 10% (for 2 to 10 ppm-hr),5% (for 10 to 100 ppm-hr)
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
Nitrogen dioxide   No
Hydrogen sulphide   + No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
- 0.25 ppm (2014) -
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