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Determination of sulphides

The S-Online for online determination of sulphides provides the opportunity to measure sulphides/H2S even below the odor threshold in wastewater.

By the combination of a highly efficient gas extraction and a selective detection method, sulphide/H2S is determined in aqueous solutions.


  • Online aquisition of the current sulphide concentration in wastewater (e. g. pump sump, pressure water pipe or sewer system) for regulation
  • Environmental analysis applications
  • Wastewater analysis
  • Landfill leachate monitoring


  • Municipal wastewater associations
  • Industrial wastewater
  • Sewage and wastewater treatment plants


  • Complete extraction of H2S from aqueous samples
  • No cross sensitivity (realized by indirect method)
  • Easy-to-use calibration
  • Completely automatic sample dosing
  • Robust and fast method of analysis (up to 12 analyses per hour)
  • Output 4- 20 mA for the integration of the H2S signal in the local system
  • High durability of the sensor by intermittent gas circuit
  • Integrated rinsing steps to ensure a constant analysis of a present sample 

Informations about the S-Online




ECH Elektrochemie Halle GmbH
Otto-Eißfeldt-Straße 8
06120 Halle (Saale)

Tel.: +49 345 279570-0
Fax: +49 345 279570-99
Mail: info@ech.de

Sales and Service Center UK

ECH Scientific Limited
Building 69, Wrest Park, Silsoe
Bedfordshire, MK45 4HS
United Kingdom

Tel.: +44 1525 404747
Fax: +44 1525 404848
Mail: info@ech.de