Water AnalyzerThe Model 204H has the ability to analytically quantify H2S in Water online with the Sample Transfer Stripper (STS) and the advanced electrochemical H2S sensor or rateometric-colorimetric H2S detector technologies.

The most effective process for measuring H2S in water involves representatively stripping the H2S vapor from the water for precise measurement in the gas phase. Direct optical measurement of H2S in the water is plagued by high routine maintenance and recalibration procedures.

The principle of operation requires a continuous free flowing water sample into the heated compartment where the STS unit separates the H2S from the water sample. An H2S free air/gas then sweeps the H2S gas sample to the H2S detector for quantitative analysis in PPBw, PPMw, and up to saturation levels.

Cemtrex offers two detection technology choices for H2S measurement in water: Smart Electrochemical Cell (Model 204H) and the ASTM approved rateometric-colorimetric tape detector (Model 205P).



  • Conformity to ASTM Methods
  • Specific to H2S Onlytapemethod
  • Accurate and Continuous Analysis
  • Quantitative Measurement in PPB, PPM & Percent Levels
  • Push Button Validation
  • Proven Reliability
  • Normal Calibrations Not Required
  • Fast Response Time
  • Remote & Web based monitoring/control of analyzer
  • ATEX and IECEx certificates available



  • Wastewater treatment facilities, industrial discharger, optimize chlorine injection for municipalities/cities
  • H2S in cooling tower water
  • Well water, pond water, holding water, ditch water
  • Refining processing/industrial water
  • Seawater in fractionating towers


Download specifications Model 204H H2S in Water (Electrochemical Method)

Download specifications Model 205P H2S in Water (Tape Method)

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