Hydrocyanic Acid Detection Tubes 0,5a (0.5 - 50 ppm)
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 vapors can be detected and measured, such as:
- Determining and measuring concentration peaks
- Measuring personal exposure in the inhalation area
- Detecting leaks in pipelines, gas installations etc.
- Air analysis in sewers, shafts and confined spaces
Hydrocyanic Acid Detection Tubes 0,5a (0.5 - 50 ppm)
| Standard Measuring Range: |
0.5 to 5 ppm |
5 to 50 ppm |
| Number of Strokes (n): |
10 |
2 |
| Time for Measurement: |
approx. 2.5 min |
ca. 0.5 min |
| Standard Deviation: |
±10 to 15 % |
| Color Change: |
yellow ─> red |
| Temperature: |
0 to 40° C |
| Absolute Humidity: |
< 40 mg H2O / L |
| Reaction Principle: |
a) HCN + HgCl2 --> HCl
b) HCl + methyl red --> red reaction product |
| Cross Sensitivity: |
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. |
Hydrocyanic Acid Detection Tubes 0,5a (0.5 - 50 ppm)
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