Methyl Mercaptan Detection Tubes (0.25 to 140 ppm)

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Item #: 71
MFG: GasTec

UOM: Box of 10

$91.80 Was: $104.08
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Methyl Mercaptan Detection Tubes (0.25 to 140 ppm)

Gastec Detection Tube No. 70 measures Methyl Mercaptan with a Range of 0.25 to 140 ppm.

  • Measuring Range:
    • 0.25 to 2.5 ppm
    • (2.5) to 70 ppm
    • 70 to 140 ppm
  • Number of Pump Strokes: 2 to 10, 1, 1/2
  • Correction Factor: 1/2 to 1/10, 1, 2
  • Sampling Time: 1.5 minutes per pump stroke
  • Detecting Limit: 0.1 ppm (10 pump strokes)
  • Changes from White to Yellow
  • Corrections for temperature & humidity: Temperature correction is necessary
  • Reaction Principle: 2CH3SH + PdSO4 → (CH3S)2Pd + H2SO4
  • Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 70 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
Acetylene ≧ 2000 ppm + (Two layers) Pale brown (whole layer)
Carbon monoxide ≧ 2000 ppm + (Two layers) Pale brown (whole layer)
Ethylene ≧ 2000 ppm + (Two layers) Pale brown (whole layer)
Hydrogen sulfide ≦ 500 ppm No No
Mercaptans + Yellow