Dräger Short Term Detection Tubes - Hydrocyanic Acid 0,5a (Pack of 10)8103601
Dräger Tubes For Short Term Measurements: Hydrocyanic Acid 0,5a
Dräger Safety offer a massive range of short-term gas detection tubes for the measurement of various gases. This particular set of tubes is for (Hydrocyanic Acid 0,5a).
The tubes come in a pack of 10 tubes and have a shelf life of 2 years.
|Standard Measuring Range:||0.5 to 5 ppm / 5 to 50 ppm|
|Number of Strokes n:||10|
|Time for Measurement:||approx. 2.5 min. / ca. 0.5 min.|
|Standard Deviation:||± 10 to 15 %|
|Colour Change:||yellow to red|
Ambient Operating Conditions:
|Temperature:||0 to 40 °C|
|Absolute Humidity||< 40 mg H2O / L|
a) HCN + HgCl2 ~> HCl b) HCl + methyl red ~> red reaction product
30 ppm hydrogen sulfide, 300 ppm ammonia, 40 ppm sulfur dioxide, 20 ppm nitrogen dioxide and 1,000 ppm hydrogen chloride do not affect the indication. Hydrogen sulfide causes the pre-layer to discolor to dark brown. Ammonia concentrations above 300 ppm can cause the indication at the beginning of the indicating layer to discolor back to yellow. Acylonitrile up to a concentration of 1,000 ppm does not affect the indication. It is impossible to measure hydrocyanic acid in the presence of phosphine..
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