Gastec 21LA 羰基硫测试管 COS(2-125ppm)

Indicator: 5 to 50 ppm
Measuring Range: 
+ 2 to 5 ppm, Number of Pump Strokes 2
+ 5 to 50 ppm, Number of Pump Strokes 1
+ 50 to 125 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minutes per pump stroke
Colour Change: Bluish Purple → White
Reaction Principle: COS + I2O5 + H2SO4 → SO2 + CO2, SO2 + I2 + H2O → 2HI + H2SO4
Coefficient of Variation: 10% (for 5 to 10 ppm), 5% (for 10 to 50 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

manual tube

  500 ppm +(Black) Black at 500ppm
sulphur dioxide, Carbon disulphide   + White
Carbon dioxide   No No
Nitrogen dioxide 2 ppm + Brown at 2ppm
Hydrogen sulphide 1000 ppm No effect at 1 pump stroke *1
Propane, Butane 10% No Black at the top of the discoloured area.

*1: If the primary tube is totally discoloured, the analyzer tube will be discoloured white due to the effect of hydrogen sulphide.
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
5ppm(2014) - 12 to 19%
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