Other

U.S. Geological Survey

Emile Marcel Bergeron

Eugene R D'Amaddio

Edwin V Slate

John William Pohlman

Michael Andrew Casso

Stewart E Harris

A Discrete Sample Introduction Module (DSIM) apparatus includes an internal tubing system to receive into the DSIM apparatus a discrete gas sample having a received concentration. A plurality of valves selectively partitions the internal tubing system to form a plurality of loops corresponding to a plurality of loop volumes to contain the discrete gas sample. The plurality of loop volumes receives a carrier gas to dilute the discrete gas sample to a plurality of preselected dilutions. The DSIM apparatus circulates a given one of the plurality of preselected dilutions for analysis by a spectrometer coupled to the DSIM apparatus.

Discrete sample introduction module (DSIM) for gas analysis by laser absorption spectroscopy

The present invention relates to an underwater apparatus, system and method for inspecting and determining the condition of a submerged structure. More particularly the present invention utilizes acoustical devices for the positioning of an inspection vehicle, with respect to the structure to be inspected.

Method and apparatus for inspecting a submerged structure

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Falmouth, MA, United States of America

Emile Marcel Bergeron