Benzene Detection Tubes 15/a (15 - 420 ppm)
For short-term measurements more than 160 Draeger-Tubes are available to measure the so-called spot concentrations of specific gases. A wide range of different gases and vapours can be detected and measured, e.g.: Determining and measuring concentration peaks, Measuring personal exposure in the inhalation area, Detecting leaks in pipelines, gas installations etc., and Air analysis in sewers, shafts and confined spaces.
Contains 10 tubes
|Standard Measuring Range||15 to 420 ppm|
|Number of Strokes (n)||20 to 2|
|Time for Measurement||approx. 4 min.|
|Standard Deviation|| ±30 %|
|Colour Change||white ─> red brown|
|Temperature||0 to 30° C|
|Absolute Humidity||max. 30 mg H2O / L|
|Reaction Principle||2 C6H6 + HCHO ─> C6H5-CH2-C6H5 + H20|
C6H5-CH2-C6H5 _ H2SO4 ─> p-chinoid 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.