Multi-component gas analyzer system
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A multi-component gas analyzer system (Multi-GAS) is an instrument package used to take real-time high-resolution measurements of volcanic gases.[1] A Multi-GAS package includes an infrared spectrometer for CO2, two electrochemical sensors for SO2 and H2S, and pressure–temperature–humidity sensors, all in a weatherproof box.[2][3] The system can be used for individual surveys or set up as permanent stations[1] connected to radio transmitters for transmission of data from remote locations.[4] The instrument package is portable, and its operation and data analysis are simple enough to be conducted by non-specialists.[5]
Multi-GAS instruments have been used to measure volcanic gases at Mount Etna, Stromboli, Vulcano Italy, Villarrica (volcano) Chile, Masaya Volcano Nicaragua, Mount Yasur, Miyake-jima and Mount Asama Japan, Soufrière Hills Montserrat, with permanent installations at Etna and Stromboli.[6]
The development of this instrument has helped scientists to monitor real-time changes in volcanic gas composition, allowing for more rapid hazard mitigation and an enhanced understanding of volcano processes.[7][1]