Nitric Acid Detection Tubes 1/a (1 - 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 vapours 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
|Standard Measuring Range:
||5 to 50 / 1 to 15 ppm
|Number of strokes n:
||10 / 20
|Time for Measurement:
||approx. 2 min / approx. 4 min
||± 10 to 15 %
||blue ──> yellow
||5 to 40 °C
||3 to 15 mg H2O / L
||HNO3 + bromophenlo blue ──> yellow reaction product
||Hydrogen sulfide and nitrogen dioxide in the TLV range do not interfere, however, 50 ppm nitrogen dioxide gives an indication similar to 3 ppm nitric acid. It is impossible to measure nitric acid in the presence of other mineral acids. Chlorine discolors the indication layer grey, and this makes it difficult to evaluate the nitric
acid indication. If chlorine is present in the TLV range, this leads to slightly higher nitric acid indications.