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.

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

Einfache Durchflussmessung mit NivuFlow Stick

Complete detection oft the flow velocity 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 Error-free 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

The menu display guides you quickly and intuitive through the measurement — The menu display guides you quickly
and intuitive through the measurement

From critical tester to enthusiastic user:

"Device is very easy and intuitive to use, quick reliable measurement“

Environmental authorities,
Universities,
Water protection authorities

... and soon you too?

Assembly of the 3P-Pole

Accessory for measurement in water depths up to 100 cm

Product Presentation at IFAT

Common

Technical Datas
Measurement principle	Ultrasonic cross-correlation with real flow profile measurement (flow velocity) Hydrostatic (depth measurement relative to atmospheric pressure)
Power supply	8x rechargeable battery, commercially available, nominal voltage 1.2 V or 8x standard battery type AA, commercially available, nominal voltage 1.5 V
Lifetime	12hrs. in continuous operation (when operating with 2,650 mAh batteries and an ambient temperature of 15°C)
Enclosure	Protection: IP67 (closed)
Weight	approx.. 4.1 kg
Operating temperature	-20…70°C (device without batteries) It is essential to observe the corresponding instructions/recommendations of the manufacturers of the batteries/rechargeable batteries used.
Storage temperature	-30°C…+70°C (device without batteries)
Operation	On/Off Switch; via WLAN with display and operating module provided by customer (smartphone, tablet, notebook, etc.)
Velocity Measurement	Measurement Range: -1…+6 m/s Resolution: 0.001 m/s Number of scan layers: max. 16 Error limits (per scan layer): < 1 % of measurement value (v > 1 m/s) < 0.5 % of measurement value + 5 mm/s ( v < 1 m/s)
Depth measurement	Resolution: 1 mm Measurement range (pressure measurement cell): 0…5 m Measurement uncertainty: < 0.5 % of final value
Temperature measurement	Resolution: 0.1°C Measurement uncertainty: 0.1 °C
Acoustic frequency	3 MHz
Minimum water depth for accurate velocity measurement	at least 3 cm above sensor Max. measuring depth in the medium (immersion depth): NivuFlow Stick NFS002: 75 cm 3-piece rod NFS0 STG 3TLG: 100 cm
Data memory	1,400 Discharge measurements
Data transmission	Via WLAN
Sensor	CSM Flow velocity wedge sensor with pressure measurement

Specifications subject to change.

Brochure NivuFlow Stick

Mobile Measuring System for Discharge Measurement in Flowing Waters

download file
PDF 2 MB

Instruction Manual Rev. 02 "NivuFlow Stick - Mobile Flow Measurement System"

download file
PDF 4 MB

Declaration of Conformity | Portable flow measurement transmitter NivuFlow Stick

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PDF 191 KB

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+49 7262 9191-794

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+49 7262 9191-955

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