Precision Measurement Engineering, Inc. (PME)

Mixing processes below evaporation reduction covers - a use for the scamp and MSCTI

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Researchers from the Griffith School of Engineering at Griffith University in Australia are assessing a variety of methods for reducing the rate of evaporation. These methods include the implementation of a water cover and chemical films.PME’s MicroScale Conductivity and Temperature Instrument (MSCTI) and the Self Contained Autonomous MicroProfiler (SCAMP) are being used study mixing dynamics in relation to evaporaMotion rates and heat transfer. SCAMP will be used to look at accurate water temperature and turbulence profiles, while the MSCTI will be used in a variety of laboratory experiments.

Information provided by Deputy Head of School, Charles Lemckert with Griffith School of Engineering.

Monterey Bay Research with SCAMP

“Coincident measurements of chlorophyll a and temperature microstructure from Monterey Bay, California, are used to investigate the vertical structure and dynamics of a phytoplankton thin layer in the context of vertical turbulent mixing.”

Steinbuck, J.V., M.T. Stacey, M.A. McManus, O.M. Cheriton, and J. P. Ryan, 2009: “Turbulence observations in a phytoplankton thin layer: Implications for formation, maintenance, and breakdown.” Limnology and Oceanography, 54, 1353-1368.

IWER Conference on Evaporation

Griffith University will be holding the International Workshop on Evaporation from Reservoirs workshop from December 9-11, 2009 on the Gold Coast, Australia. Themes include evaporation measurement techniques, management strategies, evaporation control systems, future directions and case studies.

LakeESP Movie

PME has created an informational video about the LakeESP. This video describes the various sensors available for the system, how the system is installed to compensate for fluctuating water levels, and research applications for the system.

PME is presently developing the Lake Environmental Sensing Platform. The system will measure metrology and will include below water sensors such as temperature, dissolved oxygen, PAR and pressure. Future sensors will include pH and conductivity. Data is telemetered to a shore computer.

DO Sensor Configuration

Dissolved Oxygen sensors can be attached to the T-Chain with a long pigtail. Some customers have requested pigtails from 2 to 5 meters.

DO sensors with long pigtail attachments can be moved along the T-Chain allowing for flexible data collection points in the water column.

The DO sensor is an optode that measures the concentration of oxygen dissolved in water. This sensor features rapid time response and measurement accuracy of roughly 5% over a range of 0 to 150% oxygen saturation.

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