• Conformity to ASTM Methods
  • Specific to H2S Only
  • Accurate and Continuous Analysis
  • Quantitative Measurement in PPB, PPM and Percent Levels
  • Push Button Validation
  • Proven Reliability
  • Normal Calibrations Not Required
  • Fast Response Time
  • Awarded “Preferred Vendor” by Saudi Aramco
  • Remote and Web based monitoring/control of analyzer
  • ATEX and IECEx certificates available

Product Overview

H2S in Water Analyzer: The ability to analytically quantify H2S in Water online is enhanced with the Sample Transfer Stripper™ (exclusive KECO Membrane Technologies) and the advanced electrochemical H2S sensor or rateometric-colorimetric H2S detector technologies offered by KECO. Economic payout is increased because of this automated and continuous process monitor. 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.

KECO utilizes the state-of-the-art Sample Transfer Stripper (STS) with exclusive KECO Membrane Technologies to efficiently and reliably separate the H2S from the water sample for measurement by the advanced electrochemical sensor or rateometric-colorimetric H2S detector. The STS is a very simple device that provides an ultra-clean and dry sample to the detector for analysis. This results in radically reduced maintenance requirements when compared to direct optical measurement techniques. KECO is established as the world-wide leader in H2S in water analysis due to the many benefits of this exclusive technology. 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 or nitrogen carrier then sweeps the H2S gas sample to the H2S detector for quantitative analysis in PPBw, PPMw, and up to saturation levels.

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

Read the success cases for this analyzer.


Wastewater Treatment Facilities, Industrial discharger, optimize chlorine injection for municipalities/cities
To control odor and prevent costly repairs due to corrosion caused by H2S in wastewater, the Model 205 continuously monitors the H2S (sulfide) content in the liquid phase. This can include real-time monitoring of an industrial discharger. The model 205 will save costs in the optimization of chlorine injection for sulfide control by reliably monitoring the H2S (sulfides) in the collection system in real-time. Solubility of H2S in water is 3,369 ppm w.

H2S in Cooling Tower Water
The analyzer can measure H2S in cooling tower water which can result from heat exchanger leaks of H2S into the water.

Well water, pond water, holding water, ditch water
Anywhere H2S endangers water the model 205 accurately measures the concentration continuously on-line. The model 205 is used to measure H2S spills that can dissolve in wastewater, ponds or ditches. Solubility of H2S in water is 3,369 ppm w.

Refining Processing/Industrial Water
Refining process use the model 205 analyzer to measure H2S in crude oil to regulate injection of chemicals such as caustic to remove H2S. Water wash removed these reaction products. The Model 205 is used to measure any H2S in the water.

Measure H2S in Seawater in Fractionating Towers
Another application for measuring H2S in water is in separating heavy hydrogen isotopes from sea water. Atomic energy of Canada built 8 fractionating towers that separated the content by flowing H2S counter current to the sea water. This process used 14 analyzers measuring H2S in the water.

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