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​The RAVEN-EYE® is the newest non-contact RADAR area/ velocity flow meter for open channel flow measurements from Flow-Tronic. It combines state of the art non-contact radar measuring technology which measures flow from above the water surface with easy integration into existing SCADA or telemetry systems.

The RAVEN-EYE® has been designed for flow measurement in municipal wastewater and storm water sewers and easily adapts to a wide range of applications. Being positioned above the water surface, the RAVEN-EYE® avoids thereby all problems (grease, fouling, corrosive liquids) associated with traditional flow meters where the sensor is immersed in the fluid. 

No Maintenance
Maintenance is completely removed as the sensor is not in contact with the flow. The RAVEN-EYE® builds on years of experience measuring sewer flows, the sensor is totally sealed, no joints, seals, screws or washers are used. It’s rated to IP68 which means it withstands surcharge events and aggressive atmospheres. Internal sensors monitor and report the condition or “health” of the system (auto-diagnostic system).

The combination of these benefits and virtually zero maintenance requirements, give the user a very low “Cost of Ownership”.

Rivers, Channels & Irrigation

  • Storm water monitoring & compliance
  • Climate & hydraulic engineering
  • Storm water basins calculations
  • Permanent measurements of surface water 

Industry & Hydropower

  • Plant effluent
  • Process waste water
  • Flows with high solid contents
  • Cooling water
  • Industrial compliance monitoring , Caustic & corrosive flows

Wastewater Treatment Plants

  • Flow to treatment
  • Discharge
  • Plant effluent
  • Storm discharge
  • Process flow control


  • Accurate flow measurement
  • Cost-effective
  • Portable or stationary version available
  • Non-contact: the sensor is positioned above the water surface
  • Easy installation
  • Robust IP68 (PU) enclosure
  • Totally sealed sensor: no joints, seals or screws
  • Developed for field applications
  • Velocity distribution analysis & self-learning technology for average velocity calculation
  • For channels from 100 mm and upwards , Easy integration with SCADA,
  • PLC or telemetry systems
  • Perfect solution for difficult flow conditions: high solids content, high temperature, shallow and caustic flows, high velocities and large open channels
  • No maintenance
  •  Auto-diagnostic system 

Surcharge Conditions
The RAVEN-EYE® can be combined with optional surcharge velocity sensors and depth sensor in case a continuous measurement is required when the flow changes from open channel flow to surcharged flow conditions. 

Flow-Tronic Raven Eye Distributor Philippines

The flexibility of the system and the wide range of mounting equipment make it really easy to install the sensor without specific engineering works and is ideal for retrofitting. The RAVEN-EYE® can be mounted in an existing manhole or under a bridge avoiding personnel to have contact with the flow.


Sewer/Channel Networks Monitoring

  • Large sewer channels
  • Capacity studies
  • Combined sewer overflow (CSO) studies , Inflow & infiltrations studies
  • High velocity flows
  • Discharge