Benzene Detection Tubes (0.2 to 66 ppm)

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Item #: 121SP
MFG: GasTec

UOM: Box of 10

$68.12 Was: $86.48
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Benzene Detection Tubes (0.2 to 66 ppm)

Gastec Detection Tube No. 121SP measures Benzene with a Range of 0.2 to 66 ppm.

  • Measuring Range:
    • 0.2 to 20 ppm - 3 pump strokes
      Correction factor: 1
    • 20 to 66 ppm - 1 pump stroke
      Correction factor: 3.3
  • Sampling Time: 2 minutes per pump stroke
  • Detecting Limit: 0.1 ppm (3 pump strokes)
  • Color Change: White to Brown
  • Corrections for temperature & humidity: Unnecessary
  • Relative Standard Deviation: 10% (for 0.2 to 5ppm) , 5% (for 5 to 20 ppm)
  • 2 Year Shelf Life
  • Reaction Principle:
    • 2C6H6 + HCHO → C6H5 - CH2 - C6H5
    • C6H5 - CH2 - C6H5 + H2S2O7 → Reaction product
  • Store the tubes at a cool and dark place
  • Comes in a box of 5 detector tubes and 5 pre tubes

Possible coexisting substances and their interferences:

Substance Concentration Interference Changes color by itself to
Hexane ≦ 500 ppm No No
Toluene ≦ 300 ppm No No
Xylene ≦ 350 ppm No No