Draeger CH28401 Polytest Detector Tubes (10 tests per box)

Application Range:

• Standard Measuring Range: Qualitative determination of easily oxidable substances
• Number of Strokes n: 5
• Time for Measurement: approx. 1.5 min
• Color Change: white → brown, green or violet (depending on substance)

Ambient Operating Conditions:

• Temperature: 0 to 50 °C
• Absolute Humidity: max. 50 mg H2O / L

Reaction Principle:

• CO + I2O5→ I2 + CO2

Cross Sensitivity:

• Based on the reaction principle, many easily oxidised compounds are indicated, several examples are shown below:
  2000 ppm acetone / 10 ppm acetylene
  50 ppm ethylene / 1 ppm arsine
  10 ppm octane  / 50 ppm benzene
  500 ppm propane / 100 ppm butane
  5 ppm carbon monoxide / 10 ppm styrene
  1 ppm carbon disulfide / 20 ppm perchloroethylene
  2 ppm hydrogen sulfide / 10 ppm toluene, Xylene
  Methane, ethane, hydrogen and carbon dioxide are not indicated.

Additional Information:

• If there is no reading, this does not always indicate that easily oxidizable substances are not present.
• In the individual case, the use of Dräger Polytest should be qualified by independent methods, particularly when combustible gases and vapors close to the LEL, or toxic substances are suspected.