Flow Meter

NivuFlow Stick

Part No. NFS0

Mobile measurement system for discharge measurement in watercourses, such as rivers, streams and canals.

The NivuFlow Stick is a mobile measurement system for discharge measurement in watercourses, such as rivers, streams and canals.

[Translate to English:] Abflussmessung mit NivuFlow Stick

[Translate to English:] Erfassung des Durchflusses mit NivuFlow Stick

[Translate to English:] Durchflussmessung bei breitem Fluss

[Translate to English:] Durchflussmessung an schmalen Fluss

[Translate to English:] Hydrologie - einfache Abflussmessung

[Translate to English:] NivuFlow Stick Transportkoffer

Einfache Durchflussmessung mit NivuFlow Stick

Complete detection of the profile
Discharge calculation method according to
ISO 748:2021: Mean-Section, Mid-Section method
Integrated hydrostatic level measurement
Fully automatic calculation of the discharge volume
WLAN Communication
Browser-based operation via smartphone/tablet/laptop
No additional software required
Memory for 1400 discharge measurements
Note field with 300 characters
Self-diagnosis of sensors & measurement quality

NivuFlow Stick enables reliable and convenient discharge measurements in rivers, streams and canals.

The compact system can be easily transported in any car and is ready for use within seconds. Convenient operation via smartphone or tablet makes measurements simple and intuitive. With a short briefing, even users who have never worked with this device before can immediately perform errorfree and reliable measurements. The system contains no wearing parts and is maintenance-free. All components are weight-optimised and compactly attached to the holding rod, which makes handling in the water effortless and safe.
The stored data can be read out directly on site via WLAN. Previous measurements can be loaded and visualised. Deviations in the measurement quality are signalled by the system and the quality indication is always stored in the data. The system is unique worldwide in the simplicity of its operation and the speed with which a measurement can be carried out.

Graphical representation of the flow curve in each vertical

Measuring Principle

The flow velocity is measured by the ultrasonic cross correlation measurement principle. Thanks to this technology, the sensor can measure velocities at different water depths with high resolution. This brings a great advantage in terms of measuring time as well as a more accurate determination of the flow velocity curve. Our cross correlation sensors are equipped with a pressure measurement cell for reliable level measurement.

Scatterers (particles, minerals or gas inclusions) present in the medium are scanned with ultrasonic impulses and stored as an echo pattern. Further scans take place in the millisecond range.
The position of the particles is determined via the transit time of the ultrasound. A comparison of the time-delayed signals allows the flow velocity to be calculated. This results in a profile of the flow velocities from the bottom to the surface.

NivuFlow Stick works very precisely and uses the ultrasonic cross-correlation measuring principle. You can find it in the Know-How area