Opsis introduces a new method for monitoring of hydrogen sulfide (H2S). The Opsis Hot Wet Extractive system is used in combination with a long-lasting gas converter. H2S is converted into other components that are easily measured with Opsis UV DOAS system. No scrubber is needed and the system can monitor all other relevant gases using a separate optical path.
Monitoring H2S can be difficult, according to Opsis. The UV absorption is without structure and the IR absorption has strong interference from H2O. The traditional method is to remove all sulfur dioxide (SO2) from the sample while keeping H2S, then to convert H2S to SO2 and finally to measure SO2, which then effectively yields the H2S concentration. The instruments used have often been ambient air SO2 analyzers and extractive dilution systems. However, it is not unusual to experience practical problems with these type of installations, according to Opsis.
Features of the Opsis Hot Wet Extractive System include:
• 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
• Serviced by highly skilled service network
