Item #: 6728681
MFG: Draeger

Chromic Acid Detection Tubes 0.1/a (0.1 - 0.5 mg/m3)

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 Range0.1 to 0.5 mg/m3
Discoloration compared to color standard
Number of Strokes (n)40
Time for Measurementapprox. 8 min.
Standard Deviation±50 %
Colour Changeviolet ─> violet
Temperature5 to 40° C
Absolute Humidity< 20 mg H2O / L
Reaction Principlea) CrO3 + H2SO4 > Cr^VI
b) Cr^VI + diphenylcarbazide >
Cr^III + diphenylcarbazone
Cross SensitivityMetal chromates such as zine or
strontium chromate are indicated
with about half the sensitivity. Cr^III
compounds do not affect the indication.
Very high chromate concentrations lead to
a rapid bleaching of the indication.
Measurements should be repeated
with less strokes.
Additional InformationAfter carrying out the required 40 pump
strokes the reagent ampoule must be
broken, the liquid transferred onto the
indicating layer and carefully drawn
through it using the pump.