Item #: 6728791
MFG: Draeger
Price: $128.00
$128.00

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 Range2 to 15 mg/m3
Number of Strokes (n)10
Time for Measurementapprox. 2.5 min.
Standard Deviation±20 to 30 %
Colour Changeyellow ─> red
Temperature0 to 30° C
Absolute Humidity< 20 mg H2O / L
Reaction Principlea) 2 KCN + H2SO4 > 2 HCN + K2SO4
b) 2 HCN + HgCl2 > 2 HCl + Hg (CN)2
c) HCl + methyl red > red reaction product
Cross SensitivityFree 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 InformationAfter 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.
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