S-Online - Description

  The S-Online for online determination of sulfides provides
  the opportunity to measure sulfides/H₂S even below the
  odor threshold in wastewater. By the combination of a
  highly efficient gas extraction and a selective detection
  method, sulfide/H₂S is determined in aqueous solutions.
  After dosing, the sample is acidified forming H₂S gas which
  is then degassed from the solution in the H₂S analyzer.
  The gas is then carried into an amperometric sensor that
  is sensitive to detecting H₂S.
  Therefore, interferences of the sample matrix do not affect
  the sensitive measurement. Even complex matrices such as
  industrial wastewater (e. g. containing alkaline wastewater,
  hydrocarbons or ammonia) can be monitored instantly

as well as providing reproducible results.
The wastewater sample is taken up automatically.
By the use of an integrated automatic back-purging,
the system is robust and low-maintenance.
The measuring range can be varied widely and
can also be adjusted to the required application.
For instance, the S-Online can be used as a H₂S
dependent controlling system for chemical
wastewater treatment. The results can be
transferred through digital alarm- and
analog outputs into the measuring station.