Dräger Tubes For Short Term Measurements: Phosphine 0.01/a
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 (Phosphine 0.01/a).
The tubes come in a pack of 10 tubes and have a shelf life of 2 years.
|Standard Measuring Range:||0.1 to 1.0 ppm / 0.01 to 0.3 ppm|
|Number of Strokes n:||3|
|Time for Measurement:||approx. 2.5 min / approx. 8 min|
|Standard Deviation:||± 10 to 15 %|
|Colour Change:||yellow to red|
Ambient Operating Conditions:
|Temperature:||2 to 40 °C|
|Absolute Humidity||< 20 mg H2O / L|
PH3 + HgCI2 ~> HCI + Hg-phosphide HCI + pH indicator ~> red reaction product
Arsine is indicated with different sensitivity. Up to 6 ppm sulfur dioxide or 15 ppm hydrochloric acid does not interfere, but higher concentrations cause plus errors. More than 100 ppm ammonia leads to minus errors. 30 ppm hydrocyanic acid does not affect the 3 stroke test, but with the 10 stroke test minus errors of up to 50 % can occur..
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