An IGT Sampler (Isobaric Gas Tight sampler) is used to extract venting fluid from an actively venting site. This tool is used for two purposes during this expedition. This IGT is fitted with a temperature probe, which is hard-wired to Hercules so that scientists on board the Brown can read the temperatures the IGT is measuring while the IGT is bathed in vent fluid. The second purpose of the IGT is to collect a vent fluid sample in a chamber that is both sealed off to gas exchange and is held at constant temperature. Vent fluid from the gas tight samplers (both the IGT and the regular GT samplers) is analyzed for dissolved gases such as hydrogen, methane, and carbon dioxide. Image courtesy of IFE, URI-IAO, UW, Lost City science party, and NOAA.
Related Links
