Flow Meter

NivuFlow 650 Flow MeterNew

Part No. NF6-5

For pipes, open channels and water bodies

Allows high accurate flow measurements using the transit time method according to IEC 60041 for part filled and full pipes, open channels and water bodies. Up to 8 measurement paths.

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    • Ultrasonic transit time measurement
    • Single or multi path measurement, up to 32 measurement paths with extension modules 
    • Quick and easy initial start-up due to intuitive, modern operating concept
    • The wide range of NIVUS transducers ensures suitability for each measurement application
    • Online connection/data transmission and remote maintenance via Internet
    • Uncomplicated integration into existing control systems via universal interfaces
    • Weatherproof version for outdoor use available
    • Compliant with ISO 6416 & IEC 60041

    General description

    The NivuFlow 650 is compliant with both ISO 6416 & IEC 60041 and has been developed for accurate flow measurement in open channels, part full and full pipes, and surface water bodies. To meet the highest possible accuracy requirements it is currently possible to utilise the NivuFlow 650 using up to 4 velocity paths. with extention modules up to 32 velocity paths. The NivuFlow 650 operates over the full bi-directional flow range without causing obstruction or head loss where the large array of NIVUS transducer models makes flow measurement possible across the widest possible range of applications

    The compact transmitter design is easily integrated into instrument cabinets using a DIN rail mounting system and is also available with a field enclosure that provides full protection under harsh environmental operating conditions.
    The transmitter‘s large graphic display allows quick and easy commissioning of the flow metering system.

    The NivuFlow 650 provides extensive diagnostic options and allows in-depth analysis of operational function on site. The system has been developed using future proof protocols complete with versatile choices for communication and I/O connections that open up a wide range of options for operators to integrate the instruments into SCADA or similar operating systems.


    Typical NivuFlow 650 Applications

    • Measurement of surface waters such as rivers, channels and similar
    • Irrigation systems (volume distribution and billing)
    • Drainage systems
    • Hydropower plants (turbine efficiency and turbine optimisation etc.)
    • Inlets and outlets conducting cooling water or circulation systems
    • Penstock monitoring
    • Industrial process waters
      and many more
    Power supply 100 - 240 V AC, -15 % / +10 %, 47 to 63 Hz
    or 10 - 35 V DC
    Power consumption 1 relay energised, 230 V AC: (rounded) 14 W
    up to 8 sensors transit time 1 MHz
    Housing Material aluminium, plastic
    Weight approx. 1150 g
    Protection IP 20 (installation in switching cabinet), IP 68 (field enclosure)
    Operating temperature DC: -20°C to +70°C
    AC: -20°C to +65°C
    Storage temperature -30°C to +80°C
    Max. humidity 80%, non-condensing
    Display 240 x 320 pixel,
    65536 colours
    Operation rotary pushbutton, 2 function keys,
    menus in English, German, French, Swedish ...
    Connection plug with cage clamp terminals
    Inputs 2x (Type T2) 4-20 mA, with 12 Bit resolution for
    storage of data from external units, load 91 Ohm,
    2 x (Type T2) digital input
    Outputs 2 x ( Type T2) 0/4-20 mA, load 500 Ohm,
    12 Bit resolution
    1x (Type T2) bistable relay SPDT,
    load up to 230 V AC/2 A (cos 0.9),
    minimum switching current 100 mA
    1x (Type T2) relay SPDT, load up to 230 V
    AC/2 A (cos 0.9), min. switching current 100 mA
    Data memory 1.0 GB internal memory,
    readout on faceplate via USB stick
    Communication/data transmission Modbus TCP via network (LAN/WAN, Internet)
    Modbus RTU via RS485 or RS232
    Internet via Ethernet (in preparation)
    Measurement uncertainty velocity (v): ± 0.1 % of measurement value
    depending on measurement uncertainty and margin conditions
    offset velocity < ± 5mm/s
    Number of paths up to 4 measurement paths
    up to 32 paths with extention modules

    Specifications subject to change.

    NOS rod sensor for flow measurement in clean to slightly polluted media

    NOS Rod Sensor

    For measurement places with rectangular geometries
    For connection to NivuFlow 650 transmitters. High accurate flow measurement based on the transit tim...e method for open channels and waters, mainly process water channels and natural water bodies.
    NOS hemispheric sensor with mounting sheet for flow measurement in clean to slightly polluted media

    NOS Hemispheric and Ballhead Sensor

    For measurement places with various geometries
    For connection to NivuFlow 650 transmitters. High accurate flow measurement based on the transit tim...e method for open channels and waters, mainly process water channels and natural water bodies.
    NOS screw-in sensor for flow measurement in clean to slightly polluted media

    NOS Screw-in sensor

    for pressurised pipelines
    For high accurate flow measurement using the transit time method according to IEC 60041 process wate...r and high pressure lines.

    NIS Pipe Sensor

    for use in pipelines
    For full pipes. Ideal for flow measurement of process water and dirty water lines as well as hydropo...wer pipelines.
    Flow meter NIS wedge sensor

    NIS Wedge Sensor

    for large pipes and channels
    Suitable for flow measurement in part filled and full large pipelines and channels using up to 8 mea...surement paths.
    i-Series intelligent sensors for level measurement

    i-Series Sensors

    Intelligent sensors for level measurement
    Ultrasonic sensors with integrated transmitter for measurement of distance, level, empty space or vo...lumes. Suitable for harsh ambient conditions.
    NivuFlow Extension Module

    NivuFlow Extension Module

    for NivuFlow 600 and 650
    NivuFlow Extension Module for flow measurements with up to 32 paths...

    Flow Measurement in Turbine Intake

    Continuous detection of turbine intake volumes to ensure the minimum water flow of the river and to ...prevent the turbines from underload operation without shutdown.

    Irrigation Channel Flow Measurement

    Erfassung und Steuerung der Entnahmemenge von Flusswasser zu Bewässerungszwecken....

    Cooling Water Tap

    Continuous flow detection even in case of fluctuating water levels....

    Cooling Water Flow Measurement

    Investigation of cooling water volumes required for cooling of several large gas generators for wast...e heat balancing.
    Modular mounting accessories for transmitter assembly


    for installation and protection of transmitters
    The mounting accessories allow the quick and easy installation of transmitters. The solid high-quali...ty accessories made of stainless steel 1.4301 are suitable for indoor and outdoor installation. Transmitters can be simply installed in close vicinity to measurement places. Weatherproof covers protect the transmitters from influences due to weathering in outdoor areas. All accessories are supplied including the according fastening materials.
    Overvoltage protection for instruments and sensors

    Overvoltage Protection Unit

    efficient protection of instruments and sensors
    DataPro, SonicPro and EnerPro surge arrestors – highly stressable and particularly adjusted to senso...rs and transmitters. Maximum operational safety at small dimensions.
    BSG overvoltage protection enclosure

    Overvoltage protection enclosure

    for lightning or surge arrestors
    BSG 12, 32, 42 and BSG 20 Ex - for DataPro, SonicPro, EnerPro and IsoPro surge arrestors...


    Measurement data processing in the wastewater industry
    Software with adjusted functions for the wastewater industry. Functions: documentation of measuremen...t places, graphs and table views, creation of statistics/reports etc.

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