Applications » Continuous Emissions Monitoring » H2S Monitoring

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, NH₃and Hg, using a separate optical monitoring path.

Features

• 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