Carbon Monoxide (CO) Detection Tubes (6 to 1000 ppm)

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Item #: 1LA
MFG: GasTec

UOM: Box of 10

$76.56 Was: $86.95
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Carbon Monoxide (CO) Detection Tubes (6 to 1000 ppm)

Gastec Detection Tube No. 1La measures Sulfur Dioxide with a Range of 8 to 1000 ppm.

  • Measuring Range:
    • 8 to 12.5 ppm
    • 12.5 to 25 ppm
    • 25 to 500 ppm
    • 500 to 1000 ppm
  • Number of Pump Strokes: 3, 2, 1, 1/2
  • Correction Factor: 3, 2, 1, 1/2
  • Sampling Time: 2 minutes per pump stroke
  • Detecting Limit: 2ppm (3 pump strokes)
  • Changes from Yellow to Blackish Brown
  • Corrections for temperature & humidity: Temperature correction is necessary
  • 3 Year Shelf Life
  • Reaction Principle: CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3
  • Relative Standard Deviation: 10 % (for 25 to 100 ppm), 5 % (for 100 to 500 ppm)
  • Store the tubes at cool and dark place.

Possible coexisting substances and their interferences:

Substance Concentration Interference Changes color by itself to
Hydrogen ≧ 5000 ppm + Blackish brown (whole layer) (≧ 1%)
Acetylene ≧ 1/50 + Blackish brown
Carbon disulfide ≧ 1/50 + Blackish brown
Halogens ≧ 1/5 + Blackish brown
Hydrogen sulfide ≧ 1/5 + Blackish brown
Mercaptans ≧ 1/5 + Blackish brown
Sulfur dioxide ≧ 1/10 + Blackish brown
Ethylene ≦ 2000 ppm No Few minutes later, whole layer turns to brown
Nitrogen dioxide ≧ 40 ppm + (Bleaching) Red (≧ 60 ppm)