LakeESP Installed in Lake Stechlin, Berlin
June 24, 2012
PME and Terra4 recently installed a LakeESP for the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Germany, in Lake Stechlin. The installation was completed in three days and included a LakeESP station, data logger, meteorology sensors and T-Chain. The data are collected every minute and telemetered via GSM cell phone to IGB headquarters every hour. Water data include wind speed and direction, humidity, air temperature, barometric pressure, liquid precipitation and net long and short wave radiation. IGB is the largest limnological research institute in Germany. Its mission is to understand the structures and processes within aquaculture ecosystems and lay foundations for improved management. The LakeESP serves as a reference station of IGB's LakeLab, which is a new large enclosure facility in Lake Stechlin used for experiments to assess climate change impacts on the lakes. The unique infrastructure was made possible through generous funding by Germany's Federal Ministry of Education and Research (BMBF).
LakeESP Installed in Beaver Lake, Arkansas
LDS Installed in Lake Dardanelle to monitor water and weather conditions for B.A.S.S. Elite Series Diamond Drive Tournament
March 19, 2009
PME supplied the U.S. Geological Survey, Arkansas Water Science Center with a LDS station to be installed in Lake Dardanelle, Arkansas. Beaver Water District supplied the instrumentation for this purpose. Water temperature is measured at 16 depths within the 28-foot water column, and dissolved oxygen concentration is measured at 8 depths, at 30-second intervals, to provide a detailed vertical description of water-quality conditions, through time. The LDS also measures wind speed and direction, air temperature and relative humidity, short and long wave radiation. www.lakediagnostics.com
T-Chain Modified to Measure Internal Plumes February 10, 2009
PME recently modified the T-Chain for the purpose of detecting internal plumes while being towed from the back of a boat. The T-Chain was built with three pressure sensors (at multiple locations on the cable) in order to record temperature node depth. Software is availalbe to collect GPS data for constantly recording boat position as it cruises around.
If you are interested in this type of system, or another type of custom designed T-Chain, please e-mail Erik at firstname.lastname@example.org.
PME in 2008: Looking Back
February 1, 2009
PME had another interesting and productive year. We developed a PAR sensor for the T-Chain, attended the ASLO Summer conference, monitored temperature data under a sheet of ice and much more. For photos and more PME events in 2008, please click the image below.
Deadwood Reservoir LDS Transmits Data Through Winter April 8, 2008
Last September, 2007, PME visited Deadwood Reservoir in Boise, Idaho to reformat the LDS for the Bureau of Reclamation (BOR). The station was removed from the reservoir and the top mast was located on shore to keep collecting meteorological data. The sub-surface temperature and oxygen chain remained suspended. With air temperautres reaching -10° C and record snow fall levels, the top mast transmitted meteorological data continuously. The T-Chain collected data under a sheet of ice.
LDS Installed in Beaver Lake by USGS February 11, 2008 A Lake Diagnostic System (LDS) was installed early February for the U.S. Geological Survey. Real-time data such as temperature, dissolved oxygen, and meteorology (wind speed, solar radiation..etc.) is being collected and sent via cell phone. To view real time data, please visit CWR's OLARIS site and choose Beaver Lake from the first drop down list, and LDS from the second.
PME Develops Re-Calibration Facility January 8, 2008
PME has recently developed a re-calibration system for the T-Chain. It is suggested that each T-Chain be re-calibrated every few years to maintain accuracy. The system contains a control program that steps through the 0 to 38 deg C range in 1/2 deg C increments and collects the temperature chain calibration data. The control system will adjust the power supply current to give the bath thermal stability.
PME and CWR Install LDS for Bureau of Reclamation July 14, 2007 PME and CWR supplied the LDS, meteorological sensors, shore station and are responsible for installing the LDS, training the Bureau of Reclamation personnel, designing and configuring Iridium satellite communication as well as analyzing and modeling real-time data. The LDS will transmit data (wind speed, wind direction, net and solar radiation), temperature, and dissolved oxygen measurements to Boise USBR headquarters throughout the year. The station has been modified in order to continue transmitting data during winter months when a layer of ice forms over the reservoir.
PME Tests new T-Chain Retrieval Method April 2, 2007
PME designed a way to attach a simple scuba bag to the T-Chain. Instead of hauling the T-Chain up by hand or winch, the scuba bag is inflated (by a common pump), allowing the T-Chain to rise with the bag. PME is designing this retrieval process in order to provide a more accessible way to the oxygen sensors located on the T-Chain. This will allow an easy process for cleaning or swapping out oxygen sensors with recently calibrated units.
Video of our first test can be seen below. Note: Flash Player 6.0 or better is needed.
Company's devices used in waters around the world February 11, 2007
PME featured in the San Diego Union Tribune. Read the article.
Lake Diagnostic System News
Water World Article May 22, 2007
Precision Measurement Engineering Inc. and Centre for Water Research provide system for water quality management. View the Article
Two LDS Installed in Thomson Reservoir, Australia February 27, 2007 See the Photos
The Centre for Water Research installed two LDS in Thomson Reservoir for Melbourne Water. The LDS will be recording temperature, dissolved oxygen, water level, wind, and meteorology data, and transmitting it to OLARIS (view the data).
Larvae Found Feasting on LDS Cable November 28, 2006
Something finds the neoprene cable on the LDS tasty! Centre for Water Research (CWR) discovered tiny larvae feasting on the cable.
PME and CWR are working together to resolve this problem. Check back for progress.
Four LDS Placed in Kranji Reservoir, Kallang Basin, Marina Bay, and Marina Channel, Singapore November, 2006 Kranji Reservoir Data
LDS Project Under Way with the Bureau of Reclamation September, 2006 Custom LDS will be placed in Deadwood Reservoir Spring of 2007.Deadwood Reservoir
PME visited Deadwood Reservoir in October, 2006 to install an autonomous temperature chain and logger, which will soon be under ice. PME is scheduled to re-visit Deadwood Reservoir next spring and remove the T-Chain to collect information.
Lake Como is located in the Northern region of Italy. The purpose of this project is to manage water quality and water use through the Aquatic Real-time Management System (ARMS). Lake Como has a depth of 425m and a surface area of 145 square kilometers. Lake Como is an interest of study because it's an important water resource, used for drinking, irrigation, and power.
Lake Como is an oligomictic lake (lakes with poor, irregular, sporadic mixing) and mixing only occurs during the winter months when winds are strong. The overall goal of this project is to use the collected data to understand the lake's characteristics as well as design a decision support system that can predict when the water quality will be at risk. (Feaver & Lam 2004).
PME Sends off SCAMP 49 May 15, 2007
SCAMP number 49 is sent off to the Department of Civil and Environmental Engineering at Portland State University.
SCAMP Celebrates 12th Birthday!
March 7, 2007
SCAMP SN0003, owned by Sally MacIntyre at UCSB had been in service and producing data for 12 years. SN0003 is PME's first SCAMP and was first used in April of 1995. SCAMP was returned to us for re-calibration and will celebrate it's 12th year of service in Moorea, Tahiti.
PME Sends off SCAMP Number 48 to Esporles, Spain December 18 , 2006
PME has been producing SCAMP since 1995 and has sold more than 45 SCAMPs all over the world. SCAMP continues to gain recognition within the scientific global community.