Draeger 6724501 Toluene Diisocyanate 0.02/a Detector Tubes (9 tests per box)

Application Range:

• Standard Measuring Range: 0.02 to 0.2 ppm Discoloration compared to color comparison tube.
• Number of Strokes n: 25
• Time for Measurement: approx. 20 min
• Standard Deviation: ± 30 %
• Color Change: white → orange

Ambient Operating Conditions:

• Temperature: 15 to 30 °C
• Absolute Humidity: < 20 mg H2O / L

Reaction Principle:

• a) Pyridylpyridinium chloride + NaOH ä Glutaconaldehyde sodium oletate
• b) 2,4-TDI (also for 2,6-TDI) + HCI ä Aromatic amine
• c) Aromatic amine + glutaconaldehyde ä orange reaction product

Cross Sensitivity:

• Other isocyanates are not indicated.
• No interference by:
  • 5 ppm aniline
  • 10 ppm benzylamine
  • 5 ppm toluene
  • 20 ppm benzene
  • Mercaptans also discolor the indicating layer.

Additional Information:

• Before carrying out the measurement the lower reagent ampoule must be broken and the liquid transferred to the indication layer, so that it changes color to yellow.
• Next, the upper reagent ampoule must be broken and the liquid transferred to the indication layer, so that it returns to a white color.
• After performing 25 pump strokes wait 15 minutes before evaluating the indication.