back button

100 dpi image

Semi-Permeable Membrane Devices (SPMD's) are housed in cages such as shown here, and placed at different depths of the water column. SPMD's allow us to detect the presence and measure the amount of pollutants such as hydrocarbons, in the water. (photo: Frank and Joyce Burek)

Download/Display 300 dpi image
NOAA logo Revised November 25, 2005 by Sanctuaries Web Group
Many links leave the National Marine Sanctuary Web Site - please view our Link Disclaimer for more information
National Ocean Service | National Oceanic and Atmospheric Administration | Privacy Policy | Contact Us