Hydrogen Sulfide (H2S) Detection Tubes (0.5 to 12 ppm)

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Item #: 4LB
MFG: GasTec

UOM: Box of 10

$75.21 Was: $85.29
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Hydrogen Sulfide (H2S) Detection Tubes (0.5 to 12 ppm)

Gastec Detection Tube No. 4LB measures Hydrogen Sulfide with a Range of 0.5 to 12 ppm.

  • Measuring Range:
    • 0.5 to 1 ppm
    • 1 to 6 ppm
    • 6 to 12 ppm
  • Number of Pump Strokes: 2, 1, 1/2
  • Correction Factor: 1/2, 1, 2
  • Sampling Time: 1 minute per pump stroke
  • Detecting Limit: 0.07 ppm (2 pump strokes)
  • Corrections for temperature & humidity: unnecessary
  • Changes from Yellow to Pink
  • Reaction Principle:
    • Hydrogen sulfide reacts with the reagent to form intermediate material which stains indicator pink.
  • Relative Standard Deviation: 5% (for 1 to 6 ppm)
  • 2 Year Shelf Life

Possible coexisting substances and their interferences:

Substance Concentration Interference Changes color by itself to
Ammonia ≧ 2.3 ppm - No
Ethyl mercaptan ≧ 0.5 ppm + Pink (≧ 0.4 ppm)
Hydrogen chloride ≧ 4.5 ppm + Pink (≧ 4.0 ppm)
Hydrogen cyanide ≧ 0.1 ppm + Pink (≧ 0.1 ppm)
Nitric acid ≧ 6.0 ppm + Pink (≧ 5.0 ppm)
Sulfur dioxide ≧ 1.0 ppm + Pale pink (≧ 0.7 ppm)
Nitrogen dioxide ≧ 3.5 ppm - Pink (≧ 8.0 ppm)
Hydrogen fluoride ≧ 13.0 ppm + Pink (≧ 10.0 ppm)