Overview
The FLUXUS F721 is a technological breakthrough in the ultrasonic clamp-on volume and mass flow measurement of liquids.
With its state-of-the-art hardware design and powerful digital signal processing it surpasses any other non-intrusive ultrasonic flowmeter in terms of accuracy, reliability and versatility.
Highly sophisticated signal filters, faster than ever processing capacities and advanced measurement algorithms make the FLUXUS F721 liquid flow meter the standard setting measuring solution for any industrial application- even for the most challenging ones.
The meter adapts itself automatically to the respective measurement conditions and compensates for flow profile disturbances such as beam dispersal and structure-borne noise, allowing for even more precise and reliable measurements. Extreme fast measurement cycles enable precise real time monitoring of highly dynamic processes.
Pushing the Boundaries
The FLUXUS F721 offers non-intrusive flow measurement of virtually any kind of liquid, from the smallest tubing to the largest penstock, independent of the pressure inside the pipe and over a very large temperature range. Due to its advanced technology, the measurement is unaffected by solid or gaseous entrainments and distinguishes itself by its unrivalled turndown ratio: Even low flows down to only a few liters per hour can be recorded accurately.
Besides its advanced signal processing and evaluation technology, FLEXIM takes special care within the manufacturing process of the flow meter, ensuring highest precision and reliability. To achieve true zero point stability, FLEXIM carefully matches each ultrasonic transducer pair according to their individual characteristics. Due to unique transducer built-in temperature probes, the FLUXUS F721 automatically detects and compensates temperature differentials between pipe and transducer, ruling out measurement drift (ANSI/ASME MFC-5.1.-2011 regulations). Also, every transducer and transmitter is factory calibrated guaranteeing specified accuracies and ensuring highest traceability and flexibility.
Furthermore, the FLUXUS F721 shares all common advantages of our FLUXUS clamp-on flow meters in terms of ease of installation, non-existent maintenance efforts and unrivalled cost-efficiency.
As the flowmeter of choice for a very wide range of applications in virtually any industrial sector, the FLUXUS F721 is available with two different enclosure types: aluminium for standard applications and stainless steel for operation in hazardous and highly corrosive environments (ATEX, IECEx Zone 2 and FMc Class I, Div. 2 certified).
Ready for Industry 4.0
The FLUXUS F721 comes with all common communication protocols: HART, Modbus, Foundation Fieldbus, Profibus PA, BACnet and M-Bus allow bidirectional field communication and online diagnostics. The FLUXUS F721 is also one step ahead in terms of user guidance and diagnostics. It can be easily set-up and configured via USB. Its Ethernet connectivity provides additional bidirectional communication capabilities.
Further value is added by the meters advanced selfmonitoring capabilities and the possibility of event driven data recording. The flow meter is permanently controlling the quality of the measurement. Such values, but also every other measurement data as well as externally fed in data, e.g. pressure and temperatues, can be chosen to trigger free defined meter functionalities. For instance, in case the quality of the measurement is falling below a predefined value, a temporary recording of high resolution measurement data can automatically be started. Such free configurable event based trigger functionality is not only perfectly suited for measurement diagnostics, but even more for the accurate monitoring of processes and especially the supervision and control of critical operations.
Advantages
- No process interruption for installation, no pipe modification necessary - maintenance-free (no need for frequent work in hazardous areas)
- Certified for operation within hazardous areas (ATEX / IECEx Zone 2 and FMc Class I, Div. 2 certified)
- Fast measuring dynamics (output of measurement data every 10ms), capturing highly pulsating flows
- Reliable measurements of slurries or liquids with gaseous entrainments (>10% of total volume)
- High operational safety with no risk of leaks
- Independent of pipe material, diameter, wall thickness and internal pressure and temperature
- Accurate and repeatable measurement readings - even at extremely low flow rates (high turndown ratio)
- Highly cost efficient in comparison to wetted instrumentation
- Every measurement system is pre-calibrated in-house (traceable to national standards) and delivered with a calibration certificate
- Matched transducers, integrated temperature compensation (according to ANSI/ASME MFC-5.1-2011 regulations) and advanced digital signal processing guarantee a high zero point stability and drift free measurement readings
- Permanent coupling with unique couplant pads, FlexSpring secured mounting fixtures guarantee durable contact pressure also on heavily vibrating pipes
- Bidirectional communication as well as remote set-up and diagnostic capabilities
- Enabling complete monitoring of processes as well as supervision and control of critical operations
Industry applications
Bitumen Flow Measurement at an Oil Sand Facility
Bitumen Flow Measurement at an Oil Sand Facility

Flow Measurement at a Fluidized Catalytic Cracker
Flow Measurement at a Fluidized Catalytic Cracker

Flow Measurement of Heavy Gasoil Streams
Flow Measurement of Heavy Gasoil Streams

Flow Measurement of Highly Viscous Coker and Visbreaker Feed
Flow Measurement of Highly Viscous Coker and Visbreaker Feed

Flow Measurement of Bitumen
Flow Measurement of Bitumen

High Temperature Flow Measurement for Coker Control
High Temperature Flow Measurement for Coker Control

High Temperature Flow Measurement for Coker Control
High Temperature Flow Measurement for Coker Control

Flow Measurement of Heat Transfer Oil
Flow Measurement of Heat Transfer Oil

Flow Measurement of Heavy Gasoil Streams
Flow Measurement of Heavy Gasoil Streams

Overflash Mass Flow Measurement
Overflash Mass Flow Measurement

Flow Measurement of Hot Pitch during Coal Tar Distillation
Flow Measurement of Hot Pitch during Coal Tar Distillation

Flow Measurement of Heavy Crude Oil
Flow Measurement of Heavy Crude Oil

Flow Measurement of Hot Pitch during Coal Tar Distillation
Flow Measurement of Hot Pitch during Coal Tar Distillation

Flow Measurement of Hot Pitch during Coal Tar Distillation
Flow Measurement of Hot Pitch during Coal Tar Distillation

Flow Measurement of Heavy Crude Oil
Flow Measurement of Heavy Crude Oil

Flow Measurement at the Free Water Knock Out
Flow Measurement at the Free Water Knock Out

Flow Measurement during Water Purification
Flow Measurement during Water Purification

Flow Measurement of Well Flowback Fluids | FLEXIM
Flow Measurement of Well Flowback Fluids | FLEXIM

Flow Measurement of Blended Fracking Liquids
Flow Measurement of Blended Fracking Liquids

Produced Water Flow Measurement
Produced Water Flow Measurement

Flow Measurement of Produced Water or Sea Water during Injection
Flow Measurement of Produced Water or Sea Water during Injection

Flow Measurement of Blended Fracking Liquids
Flow Measurement of Blended Fracking Liquids

Produced Water Flow Measurement
Produced Water Flow Measurement

Flow Measurement of Produced Water or Sea Water during Injection
Flow Measurement of Produced Water or Sea Water during Injection

Flow Measurement at the Free Water Knock Out
Flow Measurement at the Free Water Knock Out

Flow Measurement during Water Purification
Flow Measurement during Water Purification

Flow Measurement of Well Flowback Fluids | FLEXIM
Flow Measurement of Well Flowback Fluids | FLEXIM

Flow Measurement of Blended Fracking Liquids
Flow Measurement of Blended Fracking Liquids

Produced Water Flow Measurement
Produced Water Flow Measurement

Flow Measurement of Produced Water or Sea Water during Injection
Flow Measurement of Produced Water or Sea Water during Injection

Flow Measurement during Tanker Unloading
Flow Measurement during Tanker Unloading

Flow Measurement during Tanker Unloading
Flow Measurement during Tanker Unloading

Flow Measurement during Tanker Unloading
Flow Measurement during Tanker Unloading

Flow Measurement of Sulphuric Acid in Titaniumdioxide Production
Flow Measurement of Sulphuric Acid in Titaniumdioxide Production

Flow Measurement of Sulphuric Acid in Titaniumdioxide Production
Flow Measurement of Sulphuric Acid in Titaniumdioxide Production

Flow and Concentration Measurement of Hydrofluoric Acid
Flow and Concentration Measurement of Hydrofluoric Acid

Flow Measurement of Sulphuric Acid in Titaniumdioxide Production
Flow Measurement of Sulphuric Acid in Titaniumdioxide Production

Flow and Concentration Measurement of Hydrofluoric Acid
Flow and Concentration Measurement of Hydrofluoric Acid

Mass Flow Measurement of Isocyanates at more than 200°C
Mass Flow Measurement of Isocyanates at more than 200°C

Flow Measurement of a Cold Transfer Fluid
Flow Measurement of a Cold Transfer Fluid

Flow Measurement of Methanol
Flow Measurement of Methanol

High Temperature Flow Measurement within the Production Process of TDA
High Temperature Flow Measurement within the Production Process of TDA

Flow Measurement of Phenol
Flow Measurement of Phenol

Mass Flow Measurement of Isocyanates at more than 200°C
Mass Flow Measurement of Isocyanates at more than 200°C

Flow Measurement of a Cold Transfer Fluid
Flow Measurement of a Cold Transfer Fluid

Flow Measurement of Methanol
Flow Measurement of Methanol

Mass Flow Measurement of Isocyanates at more than 200°C
Mass Flow Measurement of Isocyanates at more than 200°C

Flow Measurement of a Cold Transfer Fluid
Flow Measurement of a Cold Transfer Fluid

Flow Measurement of Methanol
Flow Measurement of Methanol

High Temperature Flow Measurement within the Production Process of TDA
High Temperature Flow Measurement within the Production Process of TDA

Flow Measurement of Phenol
Flow Measurement of Phenol

Flow Measurement of Thermal Oil
Flow Measurement of Thermal Oil

Flow Measurement of Industrial Wastewater
Flow Measurement of Industrial Wastewater

Flow Measurement of Thermal Oil
Flow Measurement of Thermal Oil

Flow Measurement of Industrial Wastewater
Flow Measurement of Industrial Wastewater

Flow Measurement of Boiler Circulation Water
Flow Measurement of Boiler Circulation Water

Flow Measurement of Cooling Water
Flow Measurement of Cooling Water

Hydraulic balancing of a cooling tower
Hydraulic balancing of a cooling tower

Flow Measurement of Sodium Hydroxide Solution in Bauxite Processing
Flow Measurement of Sodium Hydroxide Solution in Bauxite Processing

Flow Measurement of Organic Solvent in Solvent Extraction Process
Flow Measurement of Organic Solvent in Solvent Extraction Process

Flow and Concentration Measurement of Liquors in Heap Leach Applications
Flow and Concentration Measurement of Liquors in Heap Leach Applications

Flow Measurement of Flotation Feed
Flow Measurement of Flotation Feed

Flow Measurement for Feed and Process Water Applications
Flow Measurement for Feed and Process Water Applications

Flow Measurement of Slurry (Tailings Paste Fill with 70% Solids)
Flow Measurement of Slurry (Tailings Paste Fill with 70% Solids)

Flow Measurement at Ballast Water Treatment Systems
Flow Measurement at Ballast Water Treatment Systems

Engine Fuel Consumption & Cooling Circuits Flow Monitoring
Engine Fuel Consumption & Cooling Circuits Flow Monitoring

Reverse Osmosis - Seawater Flow Measurement
Reverse Osmosis - Seawater Flow Measurement

Wastewater Treatment Flow Measurement
Wastewater Treatment Flow Measurement

Flow and Thermal Energy Measurement at Refrigeration Plants
Flow and Thermal Energy Measurement at Refrigeration Plants

Turbine Efficiency Monitoring
Turbine Efficiency Monitoring

Penstock monitoring
Penstock monitoring

Technical facts
FM Class I - Div2
4-20mA HART active/passive
pulse/frequency/binary
4-20mA active/passive
Binary input
BACnet MSTP/IP
M-Bus
Profibus PA
Foundation Fieldbus