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, such as:
- Determining and measuring concentration peaks
- Measuring personal exposure in the inhalation area
- Detecting leaks in pipelines, gas installations etc.
- Air analysis in sewers, shafts and confined spaces.
|Standard Measuring Range:
||15 to 420 ppm
|Number of Strokes (n):
||20 to 2
|Time for Measurement:
||approx. 4 min.
||white ─> red brown
||0 to 30° C
||max. 30 mg H2O / L
||a) 2 C6H6 + HCHO ─> C6H5-CH2-C6H5 + H20
b) C6H5-CH2-C6H5 + H2SO4─> p-quinoid compound
||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.