Hydrogen Sulfide (H2S) Detection Tubes (25 to 1600 ppm)

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Item #: 4HM
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$75.00 Was: $83.09
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Product Details

Hydrogen Sulfide (H2S) Detection Tubes (25 to 1600 ppm)

Gastec Detection Tube No. 4HM measures Hydrogen Sulfide with a Range of 25 to 1600 ppm.

  • Measuring Range:
    • 25 to 50 ppm
    • 50 to 800 ppm
    • 080 to 1600 ppm
  • Number of Pump Strokes: 2, 1, 1/2
  • Correction Factor: 1/2, 1, 2
  • Sampling Time: 45 seconds per pump stroke
  • Detecting Limit: 5 ppm (2 pump strokes)
  • Changes from White to Brown
  • Corrections for temperature & humidity: Unnecessary
  • Reaction Principle: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
  • Relative Standard Deviation: 5% (for 50 to 800 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
Ammonia No No
Carbon dioxide No No
Carbon monoxide No No
Mercaptans No No
Organic gases & vapors No No

Hydrogen Sulfide (H2S) Detection Tubes (25 to 1600 ppm)

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