1. GENERAL ACOUSTICS © Autonomous Remote Sensing of Water Level and Waves The LOG_aLevel ® - System Based on Revolutionary Ultrasonic Technology

2. GENERAL ACOUSTICS © LOG_aLevel ® - The Ultrasound-Sensor The Innovation: Fast, precise and remote detection of waves and water levels Sensor characteristics Narrow sound beam of 3° ensures small footprint on water surface Free of disturbing minor sound beams Extraordinary high transmitting power and receiving sensitivity Technical resolution: 1 mm Accuracy in field operation: 1 cm Easy installation at any place jetties, wharfs, sluices, embankment beacons, dolphins, poles, bridges buildings, platforms, etc.

3. GENERAL ACOUSTICS © LOG_aLevel ® compared to common systems

4. GENERAL ACOUSTICS © Sound velocity gauging 12 V DC Power supply module Communication Module Radio/GPRS etc. PCMCIA Data Logger 1 GB Standard equipmentOptional accessories External Sensors (e.g. Wind) AC Power supply Wind Generator Solar Panel Buffer-Battery Ultrasonic sensor RS 232/485 output Controller Module PPS Timing Module (integrated in Controller) Display Module

5. GENERAL ACOUSTICS © LOG_aLevel ® in big housing Modular Construction Controller Data Logger Power Supply 12 V Power Supply 230 V GSM/GPRS 80 Ah Buffer Battery

6. GENERAL ACOUSTICS © LOG_aLevel ® in small housing Modular Construction Controller Power Supply 12 V Power Supply 230 V Radio Module 9,5 Ah Buffer Battery

7. GENERAL ACOUSTICS © Sound Velocity measurement due to the possible change of temperature, air pressure and humidity By using the directly measured ultrasound velocity in air and the measured travel time it is possible to accurately compute the water level due to the continuously calibration. LOG_aLevel ® Reference-Sensor

8. GENERAL ACOUSTICS © LOG_aLevel ® - Applications Water level monitoring Wave detection and analysis Flood and high water prediction Mobile Working Level Event Alerting System Water reservoir management Environmental monitoring Complete hydrological and metrological monitoring station

9. GENERAL ACOUSTICS © Example The Storm-Tide- Network in the Port of Hamburg (Location: Strandkai)

10. GENERAL ACOUSTICS © Example The Storm-Tide-Network in the Port of Hamburg (Location: Nienstedten) Ultrasound- Sensor Controller Antenna

11. GENERAL ACOUSTICS © Storm Tide Network at Port of Hamburg Nienstedten Strandkai Billwerder Sperrwerk Hamburger Schleuse Network consists of: 4 LOG_aLevel Stations Integration of wind sensor Autonomous power supply (wind and solar) Remote data transfer via GPRS

12. GENERAL ACOUSTICS © The LOG_aLevel ® - Software for data logging and control Real-Time visualizing of Water Level and the Wave Parameter (H1/3)

13. GENERAL ACOUSTICS © Level Data Example 30 sec. Measurement, then 30 min standby Real-Time Data

14. GENERAL ACOUSTICS © Quick assembly and initiation Free of calibration Maintenance-free Robust, compact and always reliable also under extreme conditions: flood, ice, storms, debris, fog, etc. Sampling rate up to 5 Hz Each single wave is measured Accuracy 1 cm and resolution 1 mm Small beam angle of sensor, no side lobes Construction near buildings possible Low power consumption of system Proved and tested (RIZA 2005, Port of Hamburg 2003, NIOT 2004) Multi-event triggering and alerting Remote access (bi-directional data transfer and control) Easy to integrate in existing networks Integration of additional sensors (e.g. metrological) Easy to use Windows-Software for data logging and control Best cost/performance ratio Summary of LOG_aLevel ® - Advantages

15. GENERAL ACOUSTICS © LOG_aLevel ® around the World LOG_aLevel is used on all continents in more than 20 countries under all possible environmental conditions 2 2 2 3 9 2 16 2

16. GENERAL ACOUSTICS © LOG_aLevel ® Selected References Rijkswaterstaat: Ministry of Transport + Watermanagement, (RIZA), The Netherlands Port of Hamburg (Hamburg Port Authority), Germany US-Army Corps of Engineers San Francisco District (USACE), USA Project: North Sea Monitoring System: Government Schleswig-Holstein, Germany Bundesanstalt für Gewässerkunde (BfG), Koblenz (Federal Institute of Hydrology), Germany National Institute of Ocean technology (NIOT), India Port of Le Havre (Port Autonome du Havre), France; Port of Seoul, Korea MRTS, Varanday-Oil and Gas Terminal, Russia Geofísica y Posicionamiento Satelital GPSCA, Maracaibo Lake, Venezuela Ecologia, Vouneuil-sur-Vienne, River Vienne, France Wasser- und Schifffahrtsamt Brandenburg (Waterways and Shipping Board), Germany Bayer. Landesamt für Wasserwirtschaft (Bavarian Ministry of Environment), Germany Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB-Berlin), Germany Agency for Water Management, Coast and Nature Protection of Lower Saxony), NLWKN – Norderney, Germany and NLWKN – Brake, Germany University of Moscow, Russia Port of Adelaide (Flinders Ports), Australia Proudman Oceanographic Laboratory, United Kingdom

17. GENERAL ACOUSTICS © Thank you for your attention!