Q-Eye Radar portable

Pulse-Wave FFT Technology 

In some applications it is an advantage to have a non contact flow measurement. When combining both Radar and Water level transmitter into a hybrid flowmeter, they provide a revolutionary approach to open channel and sewer flow monitoring. Combined are pulse wave radar velocity sensing technology with ultrasonic pulse echo level sensing to measure open channel flows.

As it is often required to carry out the measurements only for a few weeks or months to obtain representative data, HydroVision is offering the mobile version of its Q-Eye Radar flowmeter.

Q Eye radar portable flowmeter wastewater web


Sensor 1 x velocity 1 x water level (optional)
Frequency 24 GHz
V-Sensor (bi-directional)
Resolution 1 mm/s; min. wave height 3mm
Accuracy < 2,5 % of the reading ( under normal flow conditions )
Display 4 lines, 20 characters
Keyboard 4 keys
Datalogger 16 GB Micro SD card
Communication WLAN, LAN (option), Ethernet RJ45 (option)
Inputs max. 2 x 4-20 mA
Power Supply
2x rechargeable batteries, hot swappable
Enclosure HPX, Resin


PDF-Logo English:    Brochure for Non-Contact Measurements (PDF)


Non Contact Velocity Sensor


Measuring Principle Radar, 24 GHz
Velocity Range ± 0,05 m/s to ± 15,0 m/s typical
Resolution 1 mm/s, min. wave height 3mm
Min. Distance to water surface 0,2 m
Max. Distance to water surface 10 m
Operating Temp. -20°C … +70°C
Housing 100x100x42 mm (HxWxD)
Ingress Protection IP68

Water Level

Compact Ultrasonic Level Transmitter

Water level transmitter ultrasonic flowmeter


Frequency 60 kHz for WLU3702 or
80 kHz for WLU3802, WLU3902
Range 0,20 – 4 m for WLU3902
0,25 – 6 m for WLU3802
0,35 – 8 m for WLU3702
Accuracy ± (0,2% of measured value + 0,05% of range)
Cable Ø 6-12mm
Display 1 line (option)
Datalogger 10.000 sets of data (option)
Power Supply 24 VDC
Approval ATEX (option)
Mounting 1,5″ BSP/NPT for WLU3902 or
2″ BSP/NPT for WLU3802, WLU 3902
Enclosure Flame retardant plastic or powder coated aluminium


 PDF-Logo English:    Ultrasonic Water Level sensors (PDF)

Versatile contact-free flow measurement

Q-Eye Radar MT is an extremely versatile flow measurement system designed for continuous operation and suitable for measurements of flows not only in rivers and open channels, but also in municipal wastewater and storm water sewers. Compact construction combined with the contact-free measurement principle enables an easy installation and use.

flowmeter waste water sewage manhole radar contact free non contact HydroVision Q-Eye

The ultrasonic depth sensor operates by energizing a piezoelectric transducer with an electronic pulse. This pulse creates a pressure wave that travels to the flow surface where a portion returns to the transducer. Our transmitter offers the best in liquid measurement. It is easy to install, eliminates maintenance caused by sensor fouling and your personnel do not get in contact with the fluid during installation.