Methanol Detection Tubes (20 to 1000 ppm)

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Item #: 111L
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$80.95 Was: $91.91
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Methanol Detection Tubes (20 to 1000 ppm)

Gastec Detection Tube No. 111L measures Methanol with a Range of 20 to 1000 ppm.

  • Measuring Range: 20 to 40 ppm, 40 to 1000 ppm
  • Number of Pump Strokes: 2, 1
  • Correction Factor: 1/2, 1
  • Sampling Time: 2 minutes per pump stroke
  • Detecting Limit: 15 ppm (2 pump strokes)
  • Reaction Principle: CH3OH + Cr6+ + H2SO4 → Cr3+
  • Coefficient of Variation: 15% (for 40 to 200 ppm), 10% (for 200 to 1000 ppm)
  • Changes from Pale vermilion to Pale Blue
  • 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
Alcohols + Pale blue
Acetone ≧ 1000 ppm + No (≦ 1000 ppm)
Ethyl acetate ≦ 500 ppm No No (≦ 500 ppm)
Toluene ≦ 300 ppm No No (≦ 300 ppm)
Benzene ≦ 70 ppm No No

Other substance measurable with this detector tube:

Substance: Correction Factor: No. of Pump Strokes: Measuring Range:
Ethylene Chlorohydrine
by scale 3 80 to 200 ppm