Page 32: of Marine Technology Magazine (July 2013)

MTR100Aanderaa Data Instruments AS, a Xylem brand, headquartered in Bergen, Norway, designs, manufactures and sells sensors, instruments and systems for measuring and monitoring in de-manding environments. Its main market areas are Environmen- tal Research, Marine Transportation, Oil and Gas, Aquaculture, Road and TrafÞ c and Construction. Aanderaa is known for its ability to develop uncompromising state-of-the-art instrumen- tation that is both reliable and robust for long term observa- tions of the marine environment. It is a trusted source to many Oceanographic Institutes, Universities, Geophysical Surveyors, Navies, Offshore Oil & Gas E&P Companies, Drilling Compa- nies, Port & Harbour Authorities, Government Agencies, Water Authorities, and Electric Power Utilities internationally. Aanderaas? new Seaguard Host and an expanding line of distributed Smart Sensor technology, as well as its new Aanderaa Real-Time Communication System, marks a turn- ing point in distributed instrumentation for underwater and at- mospheric measurements of Hydro Acoustic, Electro-Optical, Electro-Chemical, Pressure, Temperature, Meteorological data in observing networks and self-contained instrumentation. At the core of the system is the CANBus based AiCaP pro- tocol, which enables self-detection of connected sensors and dynamic setup of conÞ guration menus. This protocol was de- veloped by Aanderaa in order to achieve the extreme low power requirements of the Underwater Observatories. The master- slave protocol extends the CANBus protocol with extra signal- ing to efÞ ciently wake up sensors or datalogger to receive data when necessary. Sensors on the bus perform their own measure- ments at the required intervals and send collected data to the Seaguard or Smartguard logger. These dataloggers assemble the datasets and package them to ensure safe communication of data to a receiving station utilizing the Real-Time commu- nication system. Sensors on the AiCaP bus are utilizing Smart Sensor technology and can operate both in the bus conÞ gura-tion and as stand-alone entities. In the latter mode, they can be interfaced to any computer or logger using the RS-232 port. AANDERAA DATA INSTRUMENTS , A XYLEM BRAND AANDERAA DATA INSTRUMENTS , A XYLEM BRAND Sanddalsringen 5b, Sanddalsringen 5b, 103 Midtun, 103 Midtun, 5828 Bergen, 5828 Bergen, Norway Norway Tel: +47 55604800 Tel: +47 55604800 Email: aanderaa. Email: [email protected] [email protected] Website: Website: www.aanderaa.com www.aanderaa.com CEO: Gretchen CEO: Gretchen W. McClain W. McClain # of Employees: 93 # of Employees: 93 preserve initial accuracy. Sea-Bird proÞ ling CTDs share key features that minimize dynamic errors. There is an en- closed ß ow path within which critical sensors (T, C, DO) are located. Pumping water through the system forces all measurements to be made on the same water sample, with predictable delay and ß ow effects. By pumping at a con- stant rate, T and C sensor response times can be engineered to match and remain independent of CTD speed. This dra- matically reduces salinity spiking errors produced when sensors with different response times encounter a gradi- ent. Since the water transit time is Þ xed, lag times between measurements are a known constant, so measurements can be aligned and coordinated relative to pressure in hardware or data processing. Sea-Bird moored CTDs also make mea- surements in an enclosed ß ow path, for different reasons. Pumping delivers a new water sample to the conductivity and oxygen sensors, independent of ambient circulation. Between measurements, water is trapped in the sensors and plumbing; anti-foulant concentration accumulates to effec- tive levels by diffusion, preserving initial accuracy for long deployments. Seaß oor Systems, Inc 3941 Park Drive Suite 20-218 El Dorado Hills, Calif., U.S. 95762 Tel: 530-677-1019 Email: adam@seaß oorsystems.com Website: www.sea ß oorsystems.com CEO/President: John Tamplin Number of Employees: 7 Seaß oor Systems, Inc. was formed in Portland, OR in 1999 by veteran Naval Hydrographer John Tamplin to provide hydrographic survey equipment and consulting to Survey companies in the PaciÞ c Northwest. Since then, Seaß oor Systems has expanded its business to provide hydrographic survey equipment rental, sales, and manufacturing to Geo- physical and Hydrographic Survey companies worldwide. With a focus on customer support and service, and a com- pany charter to provide cutting edge products and solutions at a compelling value and quality, Seaß oor is a truly cus- tomer oriented corporation32 MTRJuly/August 2013 MTR #6 (18-33).indd 32MTR #6 (18-33).indd 327/22/2013 9:35:19 AM7/22/2013 9:35:19 AM