Cyanide Detection Tubes 2/a (2 - 15 mg/m3)
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||2 to 15 mg/m3|
|Number of Strokes (n)||10|
|Time for Measurement||approx. 2.5 min.|
|Standard Deviation||±20 to 30 %|
|Colour Change||yellow ─> red|
|Temperature||0 to 30° C|
|Absolute Humidity||< 20 mg H2O / L|
|Reaction Principle||a) 2 KCN + H2SO4 ──> 2 HCN + K2SO4|
b) 2 HCN + HgCl2 ──> 2 HCl + Hg (CN)2
c) HCl + methyl red ──> red reaction product
|Cross Sensitivity||Free hydrogen cyanide is indicated already|
before breaking the ampoule.
Acid gases are indicated with different
sensitivities. A certain portion of the
cyanide can have reacted with the CO2 in
the air through hydrolysis.
It is impossible to measure cyanide in the
presence of phosphine.
|Additional Information||After carrying out the required 10 pump|
strokes the reagent ampoule must be
broken, the liquid transferred onto the
white separating layer and carefully drawn
through with two strokes in cyanide free
air using the pump. The indicating layer
must not become moist.