Benzene Detection Tubes (2 to 312 ppm)

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Item #: 121S
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$90.80 Was: $102.98
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Benzene Detection Tubes (2 to 312 ppm)

Gastec Detection Tube No. 121S measures Benzene With a Range of 2-312 ppm.

  • Measuring Range:
    • 2 to 5 ppm - 4 pump strokes
      Correction factor: 0.4
    • 5 to 120 ppm - 2 pump strokes
      Correction factor: 1
    • 120 to 312 - 1 pump stroke
      Correction factor: 2.6
  • Sampling Time: 2 minutes per pump stroke
  • Detecting Limit: 0.5 ppm (4 pump strokes)
  • Changes from White to Dark Green
  • Corrections for temperature & humidity: Unnecessary
  • Relative Standard Deviation: 20% (for 5 to 40 ppm), 15% (for 40 to 120 ppm)
  • 3 Year Shelf Life
  • Reaction Principle: C6H6 + I2O5 + H2S2O7 → I2
  • Store the tubes at a cool and dark place.
  • Comes in a Box of 5 pretubes and 5 detector tubes

Substance Concentration Interference Changes color by itself to
Hexane ≦ 100 ppm No No
Toluene ≦ 200 ppm No No
Xyelene ≦ 300 ppm No No