Phosphine (PH3) Detection Tubes (0.05 to 9.8 ppm)

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Item #: 7LA
MFG: GasTec

UOM: Box of 10

$81.83 Was: $94.20
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Phosphine (PH3) Detection Tubes (0.05 to 9.8 ppm)

Gastec Detection Tube No. 7LA measures Phosphine with a Range of 0.05 to 9.8 ppm.

  • Measuring Range:
    • 0.05 to 0.1 ppm
    • (0.1) to 1.5 ppm
    • 1.5 to 2.5 ppm
    • 2.5 to 9.8 ppm
  • Number of Pump Strokes: 10, 5, 3, 1
  • Correction Factor: 1/2, 1, 1.7, 6.5
  • Sampling Time: 1.5 minutes per pump stroke
  • Detecting Limit: 0.02 ppm (10 pump strokes)
  • Changes from Yellow to Red
  • Reaction Principle:
    • PH3 + 3HgCl2 → P(HgCl)3 + 3HCl
    • HCl + Base → Chloride
  • Relative Standard Deviation: 10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.5 ppm)
  • 2 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
Arsine ≧ 1/10 + Red
Diborane No No
Hydrogen chloride No No