Hydrogen Sulfide (H2S) Detection Tubes (12.5 to 500 ppm)

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Item #: 4M
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$75.28 Was: $85.28
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Product Details

Hydrogen Sulfide (H2S) Detection Tubes (12.5 to 500 ppm)

Gastec Detection Tube No. 4M measures Hydrogen Sulfide with a Range of 12.5 to 500 ppm.

  • Measuring Range:
    • 12.5 to 25 ppm
    • 25 to 250 ppm
    • 250 to 500 ppm
  • Number of Pump Strokes: 2, 1, 1/2
  • Correction Factor: 1/2, 1, 2
  • Sampling Time: 45 seconds per pump stroke
  • Detecting Limit: 2.5 ppm (2 pump strokes)
  • Changes from White to Brown
  • Reaction Principle: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
  • Relative Standard Deviation: 5% (for 25 to 250 ppm)
  • 3 Year Shelf Life
  • Store the tubes at 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
Mercaptans No No

Hydrogen Sulfide (H2S) Detection Tubes (12.5 to 500 ppm)

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