Item #: 8101871
MFG: Draeger

Mercaptan Detection Tubes 20/a (20 - 100 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 Range20 to 100  ppm
Number of strokes n:10
Time for Measurementapprox. 2.5 min.
Standard Deviation± 10 to 15 %
Color Changewhite  ──>  yellow brown
Temperature0 to 50°C
Absolute Humidity3 to 30 mg H2O / L
Reaction Principlea) 2 R-SH + Cu^2+ ──> Cu (RS)2 + 2H+
b) Cu (RS)2 + S ──> yellow brown copper
Cross SensitivityHigher molecular weight alkyl mercaptans
(e.g. propyl - and butyl mercaptans) are
indicated with approx.  the same sensitivity.

Hydrogen sulfide is indicated with approx.
twice the sensitivity of the mercaptans
(e.g. 10 ppm hydrogen sulfide gives an 
indication of 20 ppm). In presence of
Hydrogen Sulfide a measurement of
mercaptans is impossible.
Additional InformationAfter performing the required ten pump
strokes the reagent ampoule must be
broken. The liquid of the ampoule must
be transferred to the indicating layer and
carefully drawn through it using the pump.
After completing the measurement wait
for 3 min. prior to evaluation.