Hydrogen Sulfide (H2S) Detection Tubes (0.25 to 120 ppm)

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Item #: 4LL
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$70.95 Was: $82.09
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Hydrogen Sulfide (H2S) Detection Tubes (0.25 to 120 ppm)

Gastec Detection Tube No. 4LL measures Hydrogen Sulfide with a Range of 0.25 to 120 ppm.

  • Measuring Range:
    • 0.25 to 2.5 ppm
    • (2.5) to 60 ppm
    • 60 to 120 ppm
  • Number of Pump Strokes: 2 to 10, 1, 1/2
  • Correction Factor: 1/2 to 1/10, 1, 2
  • Sampling Time: 1 minute per pump stroke
  • Detecting Limit: 0.1 ppm (10 pump strokes)
  • Changes from White to Brown
  • Reaction Principle: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
  • Relative Standard Deviation: 5% (for 2.5 to 60 ppm)
  • 3 Year Shelf Life
  • Store the tubes at a cool and dark place.

Possible coexisting substances and their interferences:

Substance Concentration Interference Changes color by itself to
Nitrogen dioxide ≧ 1/4 - No
Sulfur dioxide ≧ 1/1 + No
Ozone Bleaching No
Hydrogen cyanide No No
Mercaptans No No