UOM: Box of 10 tubes (5 SO2, 5 H2S)

Item #: 45S
MFG: GasTec
Sale: $93.50 Was: $96.31
$93.50

Sulfur Dioxide, Hydrogen Sulfide Detection Tubes (SO2: 0.25-20 ppm, H2S: 1.25-120 ppm)

The Gastec 45S gas detection tube set contains 5 Sulfur Dioxide tubes with a measurement range of 0.25 - 20 ppm and five Hydrogen Sulfide tubes with a range of 1.25 - 120 ppm.

Name of Gas SO2 H2S SO2 H2S SO2 H2S
Measuring Range 0.25 to 0.5 1.25 to 2.5 0.5 to 10 2.5 to 60 10 to 20 60 to 120
Number of Pump Strokes 2 1 1/2
Correction Factor 1/2 1 2
Sampling Time 1.5 minute per pump stroke
Detecting Limit 0.05 ppm (n=2)
Colour Change SO2tube : Yellowish green → Yellow
H2S tube : White → Brown
Reaction Principle SO2tube: SO2 + BaCl2+ H2O → BaSO3 + 2HCl HCl + Base → Chloride
H2S tube: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation SO2 ube: 10% (for 0.5 to 2 ppm), 5% (for 2 to 10 ppm) H2S tube:10% (for 2.5 to 10 ppm), 5% (for 10 to 60 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Unnecessary
Store the tubes at cool and dark place.
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