H2S Monitoring

To  monitor H2S can be difficult. The UV absorption is without structure and the IR absorption has strong interference from H2O. The traditional way has been to remove all SO2 from the sample while keeping H2S, then convert H2S to SO2 ,and finally measure SO2 which then effectively yields the H2S concentration. The instruments used have often been ambient air SO2 analysers and extractive dilution systems. However, it is not unusual to experience practical problems with these type of installations.
OPSIS offers a better alternative for monitoring H2S in industrial applications. The OPSIS Hot Wet Extractive  system is used in combination with a novel, long-lasting gas converter. H2S is modified into other components that are easily measured with the OPSIS UV DOAS technique . No SO2 scrubbing is required. If needed, the same gas analyser can also monitor concentrations of a wide range of other gases such as NO, NO2, SO2, NHand Hg, using a separate optical monitoring path.


Best performance according to QAL 1 certification
Longest calibration interval according to QAL 1 certification
Easy and reliable design
Raw-gas and emissions monitoring with a single system, if needed
A single system can also monitor a wide range of other types of gases, if needed
Internationally approved
Thousands of systems installed worldwide
Serviced by highly skilled service network

UV DOAS System 400 Hot Wet Extractive monitoring system for H2S monitoring

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