Wellseedamm 1-3, 24145 Kiel, Germany


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NetDI® Deck-Unit

The NetDI® data logger was developed over many years to fulfill complex measuring, controlling and regulation tasks. A multitasking real-time kernel takes care of the processes of all tasks. It works on the basis of an embedded industrial ARM. The 7“ touchscreen visualizes data in a quick-look window.

The calculation of calibrations or corrections takes place in real-time – there are more than 180 formulas available to do so, like for instance the UNESCO formulas for seawater. Quality rating additional data as spikes, extremes or means are gathered simultaneously into average value windows.

A complete, configurable soft-PLC undertakes complete controlling tasks. The optional position control operates in dependence to the GPS position and geo-references the measurement data.


19” rack enclosure


19” rack enclosure (4 HU, 350mm depth) with 4 external sensor connectors IP67 water protected and 2 fluorometers connected


Metal enclosure


Metal enclosure (300 x 300 x 180mm) with 2 external sensor connectors IP67 water protected with 2 fluorometers connected


SmartDI® Deck-Unit


The OceanPack™ AUMS (FerryBox) is operated by the SmartDI® Deck-Unit. While data acquiring is performed automatically, the scientist has time to maintain his instruments


Power Controller


OceanPack™ underway system contains the NetDI® Deck-Unit. In the photo, the power controller is used to seperate power from the data acquisition. The Deck-Unit controls automatic cleaning, automatic calibration, data recording etc.


Small mobile NetDI®


Small mobile NetDI® data logger during project discussions with GEOMAR (Dr. Toste Tanhua) and Volvo Ocean Race (Dr.-Ing. Sören Gutekunst). Left Dr. Stefan Raimund from SubCtech.


Small mobile NetDI®


The small mobile NetDI® data logger.


7″ display


Small 7″ display for the mobile NetDI®


NetDI® display


Example of NetDI® display: data upload to the USB memory stick.


SmartDI® Soft-PLC


The SmartDI® Soft-PLC is can be used to control external pumps and valves. Using measuring values as input, the Soft-PLC can be used e.g. for event-triggered analyzes. In this example a combination of two sensors is used to start automatic water analysis with nutrient analyzer. Demanded storm becomes whirled up of floating substances as an event. © picture by HZG research centre


Optional quality data


The optional quality data for each measuring or average value gives much more information about the obtained state. In this example higher tidal water current is responsible for noisy turbidity values. The minimum and maximum values of the water current explain this situation very well, without the need of extra processing. © picture by HZG research centre


Position control


The Position-control allows using position-dependent events. In this example the OceanPack™ will clean itself and then switch off automatically if moving inside the harbour. Piraeus (Athens) with position recognition as entering a port is here defined with a radius of 1sm (1.852km) to the pier


Data files


The ASCII NMEA-0183 data files can be imported easily to Windows® software such as MS-Excel®


  • Lab or on-board sensor data logging with quick-look data screen
  • Special data protocols or complex real-time data processing
  • Small mobile monitoring stations
  • Data logging with extra requirements such as digital outputs, PLC functions
  • Modular data logging systems
  • Small or mdium-size and versatile data logger
  • Touch-Screen enables full control of the process and control or configuration functions
  • Medium power consumption for battery power supplies
  • Large data storage – enough to safe high-resolution measurements for years
  • Configurable input/output signals – analogue and digital
  • Flexible design for customized solutions
  • Real-time processing of values and additional quality flags and data
  • Many data protocols implemented for external sensors, devices, analyzers etc.
  • Complex control of external actors such as pumps with the build-in Soft-PLC
  • Power 12V, 24V DC or 110V-230V AC, typ. 25W incl. monitor switched-on
  • 8 GB SD card, up to 32GB.
  • Standardized ASCII NMEA-0183 output
  • External serial Interfaces RS232, RS485 optical isolated, up to 30 serial interfaces
  • Typ 1Hz sampling rate, configurable. Short time down to 100Hz. Long time cycles days…years
  • Calibration and versatile formulas included, incl. UNESCO formulas for seawater analysis
  • Operating IEEE double precision for all internal calculation
  • Many data protocols for external sensors, analyzers, samplers etc.
  • Industrial 19” rack housing
  • Additional DC/DC voltage outputs for external sensors, e.g. 12V, 24V regulated. In combination with the Soft-PLC switchable
  • Control LEDs for easy quick check after the deployment
  • Up to 30 additional RS232/RS485 interfaces
  • Configurable Soft-PLC for complex control procedures, time or event triggered with many options
  • Position control and geo-referencing
  • Interface for more than 50 probes, meteorology’s, automatic sampler and analyzer of different manufacturers (AADI Aanderaa, Bbe MOLDEANKE, FSI, GPS / NMEA-0183, RDI, Seabird, Sea&Sun, SYSTEA, TriOS, Turner, WTW, various meteorology, etc.)