Mercaptans Detection Tubes (0.5 to 120 ppm)

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Item #: 70
MFG: GasTec

UOM: Box of 10

$98.63 Was: $109.04
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Mercaptans Detection Tubes (0.5 to 120 ppm)

Gastec Detection Tube No. 70 measures Mercaptans with a Range of 0.5 to 120 ppm.

  • Measuring Range: 0.5 to 5 ppm, 5 to 120 ppm
  • Number of Pump Strokes: 2 to 10, 1
  • Correction Factor: 1/2 to 1/10, 1
  • Sampling time: 1.5 minutes per pump stroke
  • Detecting Limit: 0.2 ppm (10 pump strokes)
  • Changes from White to Yellow
  • Corrections for temperature & humidity: Temperature correction is necessary
  • Reaction Principle: 2R・SH+ PdSO4 → (RS)2Pd + H2SO4
  • Relative Standard Deviation: 10% (for 5 to 40 ppm), 5% (for 40 to 120 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, Ethylene ≧ 2000 ppm + Pale brown (whole layer)
Carbon monoxide ≧ 2000 ppm + Pale brown (whole layer)
Hydrogen sulfide ≧ 500 ppm + No

Other substance measurable with this detector tube:

Substance: Correction Factor: No. of Pump Strokes: Measuring Range:
Ethyl mercaptan 1.0 1 to 10 0.5 to 120 ppm
Isopropyl mercaptan 2.0 1 10 to 240 ppm
Methyl mercaptan 0.7 1 to 10 0.35 to 84 ppm
Propyl mercaptan 4.5 1 22.5 to 540 ppm