Hydrogen Sulfide (H2S) Detection Tubes (10 to 4000 ppm)

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Item #: 4H
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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Product Details

Hydrogen Sulfide (H2S) Detection Tubes (10 to 4000 ppm)

Gastec Detection Tube No. 4H measures Chloroform with a Range of 10 to 4000 ppm.

  • Measuring Range:
    • 10 to 100 ppm
    • 100 to 2000 ppm
    • 2000 to 4000 ppm
  • Number of Pump Strokes: 2 to 10, 1, 1/2
  • Correction Factor: 1/2 to 1/10, 1, 2
  • Sampling Time: 45 seconds per pump stroke
  • Detecting Limit: 2 ppm (10 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 100 to 2000 ppm)
  • 3 Year Shelf Life
  • Store the tubes at cool and dark place.

Possible coexisting substances and their interferences:

Substances Concentration Interference Changes color by itself to
Sulfur dioxide ≧ 1/1 + No
Ammonia No No
Carbon dioxide No No
Carbon monoxide No No
Mercaptans No No
Organic gases & vapors No No
Nitrogen dioxide ≧ 1/4 - No

Hydrogen Sulfide (H2S) Detection Tubes (10 to 4000 ppm)

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