Gastec 5LC 二氧化硫检测管SO2(0.1-25 ppm)

Indicator: 0.5 to 10 ppm
Measuring Range: 
+ 0.1 to 0.25 ppm, Number of Pump Strokes 4
+ 0.25 to 10 ppm, Number of Pump Strokes 2
+ 10 to 25 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Bluish purple → White
Reaction Principle: SO2 +I2 +2H2O → H2SO4 + 2HCl
Coefficient of Variation: 10% (for 0.25 to 2 ppm), 5% (for 2 to 10 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.1 to 0.25 ppm (0.25) to 10 ppm 10 to 25 ppm
Number of Pump Strokes
4 2 1
Correction Factor
0.4 1 2.5
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.02 ppm (n=4)
Colour Change Bluish purple → White
Reaction Principle SO2 +I2 +2H2O → H2SO4 + 2HCl
Coefficient of Variation 10% (for 0.25 to 2 ppm), 5% (for 2 to 10 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Temperature correction is necessary
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  
(Unclear demarcation)
Brown (approx.1mm long from the inlet)
Hydrogen sulphide ≧ 1/10 + White
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
- 0.25 ppm (2014) -

 

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