Benzene Detection Tubes (0.2 to 66 ppm)

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: