OTT HydroSystems

Complete hydrological gauging stations with telemetry

OTT HydroSystems offer a decisive price advantage compared to individual configured systems. The IP-enabled and highly energy-efficient datalogger OTT netDL is the core of the system. Several SDI-12 sensors may be connected to the rugged logger, as it has up to 40 channels. The measured data may be remotely transferred via the built-in cellular modem, optionally via satellite or Ethernet. The required antennas are already included in the system.

  • Turn-key solutions for stand-alone measuring stations
  • Gauging station, Pole mount
  • Battery, Solar
  • Cellular, Satellite (GOES/Meteosat)


Compact, turn-key, and convenient:

  • All components are pre-installed, pre-wired, and pre-configured – minimum installation operations required.
  • Standardized configuration resulting in particularly attractive value for money.
  • Rugged lockable stainless steel system cabinet – particularly designed for field applications.
  • Cabinet enclosure fitted with breathing gland for sufficient ventilation and drainage.
  • Powerful IP datalogger providing efficient power management.
  • Convenient stainless steel mast mounting bracket – for easy installation to masts of 1″… 4″ (accessory).
  • Alternatively stainless steel wall bracket for safe wall mounting, e.g. in gauge station (accessory).

Examples of Use

Quick and easy installation of solar powered hydrological measuring stations:

  • Ideally suited for remote locations
  • Reliable and efficient water level measurement with OTT CBS, e.g. in streams, rivers, canals, lakes, or reservoirs
  • Measurement of water level, discharge, water quality or precipitation using any type of SDI-12 sensor
  • Remote data transfer via GSM/GPRS, 3G, Ethernet, or satellite


Leaflet – OTT HydroSystems

Technical Data

Dimensions (W x H x D) 380 mm x 500 mm x 210 mm
Housing material Stainless steel
Protection class IP65
Breathing gland
Max. dimension battery: (W x H x D) 190 mm x 175 mm x 130 mm
Temperature range
Cabinet, components included -25 °C … +50 °C
Power Supply (solar energy)
Solar controller OTT PR1205
Optional: Solarpanel 12 V/30 W,
460 mm x 530 mm (W x H),
with 1″ outrigger
Optional: Battery 12 V /26 Ah
Power Supply (mains power)
Power Control Unit OTT PCU12
Optional: Battery 12 V/7 Ah
Enhanced overvoltage protection
Mains power supply (solar optional) SPD acc. to EN 61643-11: Type 3,
SPD acc. to IEC 61643-1/-11: Class III
Sensors (optional) EN 61643-21,
IEC 61643-21
Type OTT netDL 500
OTT netDL 1000 (HydroSystem F)
Integrated modem GSM/GPRS or 3G
Communications interfaces USB Host and USB Device,
RS-232 (full DB9),
Ethernet (netDL 1000)
Sensors interfaces SDI-12, RS-485 (SDI-12),
2 x status-/impulse input
2 x switched output
Analogue inputs (optional)
Flat antenna
Satellite transmitter
HydroSystem B + D Satellite transmitter for GOES/Meteosat
Water level sensor
HydroSystem C + D OTT CBS – bubble sensor for indirect water level measurement

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