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Draeger Tube, Cyanide 2/a 2-15 mg/m3, Box of 10

Draeger Tube, Cyanide 2/a 2-15 mg/m3, Box of 10

Availability: May direct ship from manufacturer.
Product Code: 6728791

Draeger Tube - Cyanide 2/a
Order No. 67 28 791

Application Range
Standard Measuring Range 2 to 15 mg/m3
Number of Strokes n: 10 (+2)
Time for Measurement: approx. 2.5 minutes
Standard Deviation: ± 20 to 30%
Color Change: yellow to red
Ambient Operating Conditions
Temperature: 0 to 30° C ~ 32 to 86° F
Absolute Humidity: < 20 mg H2O / L
Reaction Principle
a) 2 KCN + H2SO4  2 HCN + K2SO4
b) 2 HCN + HgCI2  2 HCI + Hg(CN)2
c) HCI + 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 10 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.

View the entire Draeger Tubes & CMS Handbook