Flow Meter

NivuFlow 600 Flow Meter

Part No. NF6-0

flow measurement for full pipes

Allows high accurate flow measurement using the transit time method in full pipes. Up to 4 measurement paths.

  • Proven ultrasonic transit time measurement
  • Single or multi path measurement up to 32 measurement paths  with extension modules
  • Insert or clamp-on-sensors available
  • Easy installation without interruption of running processes
  • Easy setup due to guided sensor positioning
  • Intuitive, modern operating concept for quick and easy initial start-up
  • IP68 weatherproof version for outdoor use available
  • IoT-ready with global 4G connectivity for highest availability and digital services
  • Energy-saving cycle operation for self-sufficient systems


Perfect flow measurement in full pipelines Insert or clamp-on

The NivuFlow 600 system was developed particularly for flow measurement in full pipes. To meet the highest possible accuracy requirements it is possible to utilise up to 32 velocity paths. There are pipe sensors as well as contactless clamp-on sensors available for the measurement system. It is not necessary to interrupt running processes to install both sensor types. The system is suitable for the detection of flow rates in various liquid media covering a wide range of applications.


Flow measurement systems at the highest technical level

The compact enclosure can be easily integrated into switching cabinets saving space thanks to DIN rail mounting. Moreover, the NivuFlow 600 units are available in a special field enclosure for use in rough environ­mental conditions.
The transmitter‘s large graphic display allows quick and easy commissioning of the flow metering system. It further-more provides extended diagnostic options and enables in-depth analyses of running processes on site. 

The transmitter software was newly developed from scratch. Using future-proof protocols and versatile options for communication and connections opens a wide variety of options to operators when it comes to integrate the instruments into higher systems such as SCADA or process conducting systems.


Typical applications

  • Hydropower
  • Leakage monitoring
  • Irrigation systems (volume distribution and billing)
  • Inlets and outlets conducting cooling water or circulation systems
  • Industry: process water, slightly polluted water and more
  • Comparative measurements
  • Pump monitoring and verification

The measurement principle

The NivuFlow 600 measurement principle is based on detecting the transit time of ultrasonic signals between two sensors (A and B). 
The transit time in flow direction t is shorter than it is against the flow direction t 2.

The difference between both transit times is proportional to the average flow velocity along the measurement path vM .The system calculates the average crosssectional area velocity vA from the path velocity vM and indicates it directly on the display.

Flow in full pipes is calculated by using the general equation of continuity:

Q= A • vA

A= cross-sectional area

v = average flow velocity in cross-sectional area 


The Nivu Flow 600 Transmitter

The intuitive one-hand operation and the bright high-resolution colour display allow quick, easy and cost-efficient commissioning on site. Additional input devices or software are not required.


On site from anywhere

  • Integrated data logger for high data security
  • Saved data can be recalled at any time
  • Online operation and online setting of parameters (remote control)
  • Quick and comprehensive remote diagnostics of entire measurement place


Technical Data
Technical Information
Power consumption

1 relay energised, 230 V AC: (rounded) 14 W


approx. 1150 g

Storage temperature

−30 °C to +80 °C

Max. humidity

80 %, non-condensing


240 x 320 Pixel, 65536 colours


rotary pushbutton, 2 function keys, menus in English, German, French, and others


plug with spring cage terminal blocks

  • 1x (Type T2) 4-20 mA, with 12 Bit resolution for storage of data from external units, load 91 Ohm,
  • 1x (Type T2) digital input
  • 1x (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 j 0.9), minimum switching current 100 mA
Data memory

1.0 GB internal memory, readout on faceplate via USB stick

  • Modbus TCP via network (LAN/WAN, Internet)
  • Modbus RTU via RS485 or RS232
  • Ethernet TCP/IP
Number of paths

up to 4

Specifications subject to change.


Brochure NivuFlow 600

NivuFlow 600 allows high accurate flow measurements using the transit time method in full pipes

Manual Instruction "NivuFlow 600 / NivuFlow 600 WS" (Rev. 04)

Technical description data transmission - addition to manual Rev01

NIVUS data transmission for NivuFlow 550, 600, 650, 7550, Energy Saver and NivuParQ 850 - addition to instruction manuals

Technical Instructions "NIVUS Modbus TCP/RTU"

Technical Description "Ex-Separator Module pXT0 - Transit Time"

Declaration of Conformity permanent flow measurement transmitter Nivuflow 6xx

Declaration of Conformity "Extension Modules NFE-..."

Declaration of Conformity "Permanent flow measurement transmitter with internal modem for remote data transmission Nivuflow 6xx"

NivuFlow 6-..

Declaration of Conformity "Passive Ex Separation Interface pXT0"

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