Water level & Wave Measurement

LOG_aLevel Long Range Tide Gauge

LOG_aLevel Long Range is a remote sensing, reliable and low maintenance water level gauge (tide gauge). The system can work with Ultrasound or Radar sensors. Measurement ranges up to 50 meters are possible.

LOG_aLevel is extremely robust & reliable and is used for precise measurements of all kinds of water levels and wave dynamics (up to steep waves).

LOG_aLevel can be easily extended to include a Datalogger, Data Communication systems and additional hydrological and meteorological system to form a complete monitoring station. Furthermore, multiple LOG_aLevel stations can be interconnected to form a network. Integration in SCADA systems is straightforward.

For a stationary Tide Gauge with a measurement range up to 10 meters, or using pressure sensors, please see LOG_aLevel.

For a mobile Tide Gauge please see LOG_aLevel Mobile.

  • Advantages:

    • Easy to install and integrate into SCADA systems
    • Cost effective
    • Extremely Robust & reliable
    • Used in Offshore Oil, Gas and Wind Energy Platforms around the World
    • Calibration-Free
    • Maximum Accuracy at all times
    • Maintenance-Free (no moving parts, remote sensing)
    • Reliable under Extreme Conditions: Flood, Ice, Storms, Debris, etc.
    • Narrow Ultrasound Beam for Accurate Level even at Wavy Water Surface
    • Simultaneous Wave and Level Measurement
    • Extension With Additional Sensors (Redundancy, Meteorology and Hydrology)
    • Remote Data Transmission, Control and Alerting
    • Easy Integration to Measuring Networks
    • Reduced risk of malfunction in case of flood and ice (no frozen level gauges!)
    • Fast measurements (measurement of steep waves is possible)
    • Remote sensing without influence to water surface


  • Features: 

    • Continuous speed of sound measurement with Reference sensor REF-300 ensures an always accurate, calibration-free system (applies to systems with ultrasound sensors)
    • Housing: 300x400x200mm or 500x500x200mm stainless steel with lock, seawater resistant IP class up to 67
    • Mounting of Sensors: Seawater resistant pole (stainless steel) with mounting plate
    • LOG_aLevel Windows Software for system set-up, analysis of measuring network, visualization, managing, storing and exporting of data
  •  Specifications
    Measuring range:  15, 20, 25, 30 m (ultrasonic) 40 m (radar)
    Sample rates: up to 5 Hz
    Resolution: 1 mm
    Accuracy: 2 cm
    Power supply: 24 VDC ( 230/110V AC optional)
    Data output RS232 or RS485
  • Options:

    • Ultrasound and Radar Sensors (see table below for details)
    • Power autonomy: Backup battery up to 200 Ah, Solar Power, Wind Power
    • Data logger with SD memory card (4GB / 8GB)
    • Data transmission: Radio, GPRS, Satellite, Cloud, AIS, AIS AtoN
    • Integration of any desired Hydrological and Meteorological Sensors (also in data stream, visualization and logging)
    • Example Hydrological sensors: Water temperature, Inductive current meter, ADCP, Surface Current Flow, CTD, Salinity, Conductivity, Dissolved Oxygen, etc.
    • Example Meteorological sensors:  Wind gauge, Air temperature, Humidity, Rain, Ice, Solar Radiation, Barometric Pressure, Cloud Height, Visibility, complete Weather Stations and sensors for Helidecks, etc.
    • ATEX (Ex Zone) Sensors and complete LOG_aLevel System for use in environments with an explosive atmosphere
    • Time: High accuracy GPS – date and time (pps, 1ms accuracy)
    • Data Server / Database
    • Website
    • Alerting / Early Warning System
    • Tide Analysis and Prediction (please see TidePrediction Software)
    • Hypack – Export or Data Stream
    • Interfaces: LAN (fiber optic or RJ45), Modbus RTU or TCP
    • Various Sensor bracket designs
    • Additional wave parameters, wave spectra
       Measurement Range:
      Ultrasound Sensor: Maximum distance from Sensor to Water: 30 meters
      Radar Sensor: Maximum distance from Sensor to Water: 50 meters (larger ranges possible)
  •  Applications:

    • Operation of Offshore Platforms
    • Support of Offshore Construction Work, Offshore Maintenance and Surveys
    • Optimization and Safety of Transport and Construction
    • Wave Monitoring and Analysis
    • Integration into or extension to a complete Met station
    • Load Determination for Offshore Constructions
    • Event Alerting System
    • Hydrology and Environmental Monitoring
    • Local Tide Analysis and Prediction
    • Storm Tide, Flood and Tsunami Measuring Networks
    • Real-Time Data for Vessels through AIS/AtoN
    • Wave Measurements from Jack-Ups and Rigs
    • Water Reservoir Management and River Monitoring from Bridges