Item #: 6728311
MFG: Draeger

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, e.g.: Determining and measuring concentration peaks, Measuring personal exposure in the inhalation area, Detecting leaks in pipelines, gas installations etc., and Air analysis in sewers, shafts and confined spaces.

Contains 10 tubes
Standard Measuring Range5 to 50  / 1 to 15 ppm
Number of strokes n:10 / 20
Time for Measurementapprox. 2 min. / approx. 4 min.
Standard Deviation± 10 to 15 %
Color Changeblue ──>  yellow
Temperature5 to 40°C
Absolute Humidity3 to 15 mg H2O / L
Reaction PrincipleHNO3 + Bromophenlo blue  ──> yellow
reaction product
Cross SensitivityHydrogen 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 gray, 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.