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Gastec 21 Quick-measuring Detector tubes Carbonyl sulphide COS (5~200ppm)

Indicator: 10 to 100 ppm
Measuring Range: 
+ 5 to 10 ppm, Number of Pump Strokes 2
+ 10 to 100 ppm, Number of Pump Strokes 1
+ 100 to 200 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minute per pump stroke
Colour Change: Blue → Yellow
Reaction Principle: 
- COS + I2O5 + H2SO4 → SO2 + CO2
-  SO2 + BaCl2 + H2O → BaSO3+ 2HCl
-  HCl + Base → Chloride 
Coefficient of Variation: 10% (for 10 to 30 ppm), 5% (for 30 to 100 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Details

Catalog

Manual

Performance
Measuring Range
5 to 10 ppm 10 to 100 ppm 100 to 200 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2
Sampling Time 3 minutes per pump stroke
Detecting Limit 1 ppm (n=2)
Colour Change Blue → Yellow
Reaction Principle COS + I2O5 + H2SO4 → SO2 + CO2
SO2 + BaCl2 + H2O → BaSO3+ 2HCl
HCl + Base → Chloride
Coefficient of Variation 10% (for 10 to 30 ppm), 5% (for 30 to 100 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Unnecessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Carbon disulphide   + Yellow
sulphur dioxide   + Yellow
Butane 5000 ppm No
Propane 5000 ppm No
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
5ppm(2014) - 12 to 19%
  • Quality Engagement
  • Easy change and return
  • Delivery Avaliable
  • Favorable payment

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