Methyl Bromide Detection Tubes (10 to 100 ppm)

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Item #: 136L
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$86.20 Was: $92.15
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Methyl Bromide Detection Tubes (10 to 100 ppm)

Gastec Detection Tube No. 136L measures methyl Bromide with a range of 2.5 to 200 ppm.

  • Measuring Range: 2.5 to 10 ppm, 10 to 100 ppm, 100 to 200 ppm
  • Number of Pump Strokes: 4, 1, 1/2
  • Correction Factor: 1/4, 1, 2
  • Sampling Time: 1.5 minutes per pump stroke
  • Detecting Limit: 0.5 ppm (4 pump strokes)
  • Reaction Principle:
    • CH3Br + I2O5+ H2S2O7 → Br2
    • Br2 + O-Tolidine → Yellow product
  • Corrections for temporary & humidity: Unnecessary
  • Relative Standard Deviation: 10% (for 10 to 20 ppm), 5% (for 20 to 100 ppm)
  • Changes from White to Yellow
  • 2 Year Shelf Life
  • Store the tubes at cool and dark place.
  • Comes in a Box of 5 pre tubes and 5 detector tubes

Possible coexisting substances and their interferences:

Substance Interference Changes color by itself to
Bromine, Chlorine + Yellow
Nitrogen oxides + Yellow
Saturated halogenated hydrocarbons + Yellow
Carbon tetrachloride and unsaturated halogenated hydrocarbons are trapped in the pretreatment tube

Other substance measurable with this detector tube:

Substance: Correction Factor: No. of Pump Strokes: Measuring Range:
(ppm)
Benzyl bromide by scale 1 10 to 100
Bromoform by scale 1 1 to 50
n-Butyl Bromide 1.0 1 10 to 100
Chloro bromomethane 1.1 1 11 to 110
1,1-Dibromoethane 0.7 1 7 to 70
1,2-Dibromoethane 0.8 1 8 to 80
Dibromomethane 0.5 1 5 to 50
Ethyl Bromide 2.0
1.0
0.25
1/2
1
4
100 to 200
10 to 100
2.5 to 10