NIVUFLOW 750

Precise and reliable flow measurement across a wide range of applications.

The NivuFlow 750 is a high-performance universal transmitter designed for precise and reliable flow measurement across a wide range of applications. Engineered for flexibility and accuracy, it supports multiple sensor types and measurement methods, making it an ideal solution for complex flow monitoring requirements.

Its robust design and advanced signal processing ensure dependable performance even in challenging environments.

Enquire Now

Measures: Flow

Industries: Data Centre, Discharge Licence Compliance, Environmental Monitoring, Pharma, Utilities, Wastewater, Water

Brochure

Measure. Monitor. Repeat.

For better insights, better decision-making and better process performance.

Key features & benefits:

Universal transmitter compatible with various flow sensors and measurement principles
High measurement accuracy with advanced signal processing
Suitable for open channel and partially filled pipe applications
Flexible integration with existing monitoring and control systems
Clear, user-friendly interface for easy setup and operation
Robust, industrial-grade design for long-term reliability
Ideal for water, wastewater, and industrial flow monitoring applications

Typical Applications

WWTPs
channel networks
discharge constructions
industrial wastewater networks
measurement places for billing
intakes
drainage lines
return sludge lines
recirculation lines
and many more

Product Description
Technical Data
Videos & Downloads

Flow measurement with cross correlation technology

For ultrasonic flow measurement of slight to heavily polluted media in part filled and full pipes and channels. Best possible results even under difficult conditions.

More info

Flow measurement systems at the highest technical level

Very high accuracy flow meter by means of ultrasonic cross correlation method
Also suitable for the most difficult applications
Measurement of the real flow velocity profile
Up to 32 individual velocities per sensor
Integrated, scientifically developed flow models
Worldwide connectivity for commissioning, maintenance, data transfer and service
Extensive diagnostic functions for safe and fast commissioning and maintenance
Self-monitoring and self-diagnosis with status output in accordance with Namur NE 107
Cycle operation for autonomous measurements
Combination of several partial measurement points with different measurement methods in one overall measurement

Innovation, reliability and maximum accuracy

Together with the sensors, the NivuFlow 750 forms a stationary measuring system for continuous flow measurement and flow control for low to heavily contaminated media of various compositions.

It is used in part filled and full flumes, canals and pipes of various geometries and dimensions. The measurement transducer is able to record the current flow rate at a maximum of 3 different measuring points with up to 81 flow velocity sensors.

The right sensor for each application

A wide selection of sensor designs is available for measuring flow velocity and flow level in flumes, pipes and canals ranging from very small to several metres in size: Flow velocity sensors with and without integrated flow level measurement as well as air-ultrasonic flow level sensors.

Highly resistant sensors in PEEK design with Hastelloy mounting plates or in titanium design and FEP-protected cables withstand even highly aggressive and corrosive environments.

Your benefits

Absolutely zero point stable and drift-free sensors
Low installation expenses through perfectly matched mounting accessories
Installation under process conditions
Various sensor constructions guarantee the best solution for each application
Digital signal transmission for errorfree connections over long distances
Ex approval Zone 1

Application Examples

Pump Stations
Quick and easy retrofitting to all pipework materials
No cutting or dismantling of existing pipes
Reliable and accurate measurement of slightly polluted media through to to sludge

Control Measurement Section

Measurement and control of transfer volumes in rainwater treatment plants
Reliable and accurate recording of night-time discharges, dry and rainwater volumes
Intelligent control algorithms for surge detection, quick close and flush-free as well as automatic flushing functions
Easy integration into higher-level sewer management systems

Measurement Places for Billing

Equipment for calibrated and certified billing measuring points, e.g. for industrial dischargers
Highly accurate multi-path systems with up to 288 precisely positioned individual flow velocities in the flow profile
Absolutely zero-point stable and drift-free measuring system without interference from sieve skins, grease films, etc.

Multi Measurement Places

Combination of different measuring methods at complex measurement places
Multiple measuring point capability
Integration option for up to 81 flow velocity measurement sensors
Modbus coupling of all NivuFlow transmitters

Nivu Flow 750 - Universal 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. The latest integrated numeric discharge models enable more accurate, more stable and more reliable determination of flow rates even under very difficult measurement conditions.

The 3D flow profile is calculated in real time and is reproducibly and verifiably indicated on the transmitter display. Factors influencing the calculation results such as channel shapes, discharge behaviour and wall roughness are considered during flow calculation.

Delayed discharge behaviour and variable backwater effects are reliably recorded and taken into account in the calculation. In addition to the compact DIN rail version there is a weatherproof field unit available featuring appropriate connection space for outdoor installation.

Sensor Monitoring and Self Diagnostics

An integrated, fully automatic evaluation algorithm allows a continuous check for any maintenance requirements or a necessary check of the measurement system.

A Namur NE 107-compliant diagnosis and status evaluation informs the operator about maintenance requirements, wear, sensor damage or destruction, as well as spillage or silting up of the measurement point. The sensor states classified in accordance with the Namur NE 107 protocol are shown on the graphic display using a colour-coded display and Namur-defined symbols. They can be transmitted via Modbus, integrated modem and alarm management system as well as via error message outputs.

Sensor in working order

Functionally reliable measurement within the specification

Maintenance required

Unspecific sensor behaviour (incrustations, disturbances in front of the sensor)
Measurement works, but should be checked

Sensor outside the specification

Wear/spillage
Sensor damage
Impending measurement failure

Sensor not in working order

Mechanical sensor damage
Electronic damage
Massive wear
Sensor destruction

IoT-Ready Flow Measurement

Integrated data logger for high data security and large storage capacity
Stored data can be read out at any time using integrated, global connectivity
Online operation and online parameterisation (remote control)
Quick and comprehensive remote diagnosis of the entire measuring point

Technical Data – Common
Power supply	100…240 V AC, -15 % / +10 %, 47…63 Hz or 10…35 V DC
Power supply connection	AC: Plugged and screwed spring-cage terminal block DC/DL: Plugged spring-cage terminal block
Maximum power consumption	AC: 30 VA DC: 20 W
Typical power consumption	Configuration: 1× POA-VxU1 + 1× i-Sensor + 1 relay energised + 1× iXT 230 V AC: 14 VA / 6.8 W 24 V DC: 6.2 W
Enclosure
DIN Rail enclosure	Material: Aluminium and plastic Weight: approx. 1300 g
Field enclosure	Material: Polyamide PA / Polycarbonate PC Weight: approx. 4000 g (incl. NF750 and iXT0 211)
Protection
DIN Rail	IP20
Field enclosure	IP67 (option IP68)
Operating Conditions
Protection class	Class I
Overvoltage category	II
Pollution degree	2
Operating altitude	AC unit: up to 3000 m above MSL Relay voltages >150 V: max. 2000 m above MSL (AC and DC)
Operating temperature	DC: -20…+70 °C AC: -20…+65 °C
Storage temperature	-30 °C … +80 °C
Max. ambient temperature	+50 °C
Max. humidity	80 %, non-condensing
Parameterisation & Display
Parameterisation / Programming	Menu-driven via rotary pushbutton and two function keys Languages: EN, DE, FR, IT, ES, PT, SV, DA, FI, PL, HU, RO, CZ, RU, KO, ZH
Display	Daylight-readable TFT colour graphic display Resolution: 240 × 320 pixels Colours: 65,536
Connections
General	Plugged spring-cage terminal block
AC power supply	Plugged and screwed spring-cage terminal block
Inputs
Analog inputs	1× 4…20 mA external level (2-wire probe) 1× 4…20 mA external level (2-wire probe, HART)
Sensor bus	1× RxTx bus for NIVUS air-ultrasonic active sensor (OCL)
Additional analog inputs	1× (Type S1/G1), 4× (Type SR/GR) or 7× (Type M3/G3/M9/G9) 0/4…20 mA, 12-bit resolution, accuracy ±0.4 % FS (20 mA), load 91 Ω
Digital inputs	2× (Type S1/G1), 7× (Type SR/GR) or 10× (Type M3/G3/M9/G9)
Velocity sensor inputs	1× (Type S1/G1/SR/GR), 1–3× (Type M3/G3) or 3× (Type M9/G9) POA, CS2, EBM + CSM, iXT or MPX
Outputs
Analog outputs	2× (Type S1/G1) or 4× (Type SR/GR/M3/G3/M9/G9) 0/4…20 mA, load 500 Ω, 12-bit resolution Accuracy: ±0.1 % at 20 °C (±0.4 % at -20…+70 °C)
Bistable relay	1× SPDT (Type S1/G1/SR/GR) 230 V AC / 2 A (cos φ 0.9), min. switching current 100 mA
Relays	1× (Type S1/G1), 4× (Type SR/GR) or 6× (Type M3/G3/M9/G9) SPDT, 230 V AC / 2 A (cos φ 0.9), min. switching current 10 mA
Controller & Data
Controller	1× 3-step controller, quick-close control, adjustable slide valve position on error (Available for Types SR/GR/M3/G3/M9/G9)
Data memory	Internal 1.0 GB Approx. 570,000 data sets with timestamps Readout via front USB stick
Storage cycle	30 seconds to 15 minutes
Communication
Interfaces	Modbus TCP (LAN/WAN) Modbus RTU via RS485 or RS232 SMTP / FTP / HTTP
Cellular communication	2G / 3G / 4G via built-in radio modem (Only for Types G1 / GR / G3 / G9)