Ammonia (NH3) Detection Tubes (2.5 to 200 ppm)

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Item #: 3La
MFG: GasTec

UOM: Box of 10

$77.32 Was: $88.06
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Ammonia (NH3) Detection Tubes (2.5 to 200 ppm)

Gastec Detector Tube No 3LA is used for the detection of Ammonia in air or the industrial areas and environmental atmospheric condition.

  • Measuring Range:
    • 2.5 to 5 ppm - 2 pump strokes
      Correction Factor: 2
    • 5 to 100 ppm - 1 pump stroke
      Correction Factor: 1
    • 100 to 200 ppm - 1/2 pump stroke
      Correction Factor: 2
  • Sampling Time: 30 seconds per pump stroke
  • Detecting limit: 0.5 ppm (2 pump strokes)
  • Changes from Purple to Yellow
  • Corrections for termperature & humidity: Temperature correction is necessary
  • Relative Standard Deviation: 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
  • 3 Year Shelf Life
  • Reaction Principle: 3NH3 + H3PO4 → (NH4)3PO4
  • Store the tubes at a cool and dark place.

Possible coexisting substances and their interferences

Substance Concentration Interference Changes color by itself to
Amines ≧ 1/15 + Yellow (≧ 5 ppm)
Hydrazine + Yellow
Carbon dioxide ≧ 1% - (20%) No