Draeger 8101741 Benzene 15/a Detector Tubes (10 tests per box)

Application Range:

• Standard Measuring Range: 15 to 420 ppm
• Number of Strokes n: 20 to 2
• Time for Measurement: Approx. 4 min
• Standard Deviation: ± 30 %
• Color Change: White → Red Brown

Ambient Operating Conditions:

• Temperature: 0 to 30 °C
• Absolute Humidity: max. 30 mg H2O / L

Reaction Principle:

• a) 2 C6H6 + HCHO → C6H5-CH2-C6H5 + H2O
  b) C6H5-CH2-C6H5 + H2SO4 → p-quinoid compound

Cross Sensitivity:

• Other aromatics (toluene, xylene) are retained in the pre-layer causing a reddish brown discoloration.
• If the toluene or xylene concentrations are too high the entire pre-layer up to the indicating layer is discolored making a benzene measurement impossible.
• Petroleum hydrocarbons, alcohols and esters do not affect the indication.