Flexim FLUXUS F731 Ultrasonic Flowmeter
The Flexim FLUXUS F731 is a permanently installed, non-intrusive ultrasonic clamp-on flowmeter for liquids. It measures volumetric and mass flow using the transit-time difference principle without interrupting the process or cutting into the pipe.
Product Overview
This meter mounts transducers externally on the pipe wall and delivers accurate, bidirectional flow measurement even under challenging conditions. Advanced signal processing, Synchronised Channel Averaging (SCA), and flow profile correction help maintain reliability when inlet runs are short or flow is disturbed. Matched and temperature-compensated transducers support high accuracy across a wide range of flow rates and pipe sizes. The system is suitable for standard industrial environments and is available with hazardous-area approvals.
Technical Specifications
| Specification |
Details |
| Measurement Principle |
Transit-time difference correlation (NoiseTrek for high gas/solid content) |
| Fluid Type |
All acoustically conductive liquids (<10 % gaseous or solid content by volume) |
| Flow Velocity Range |
0.01…25 m/s (0.03…82 ft/s), depending on pipe diameter |
| Pipe Size (inner diameter) |
6 mm…6500 mm (0.24…256 in) |
| Measuring Channels |
1 or 2 |
| Accuracy (system) |
±0.3 % of reading ±0.005 m/s |
| Accuracy (measuring point) |
±1 % of reading ±0.005 m/s |
| Repeatability |
0.15 % of reading ±0.005 m/s |
| Response Time |
1 s (typical), optional faster |
| Power Supply |
90–264 VAC or 11–32 VDC |
| Outputs |
4–20 mA active/passive, HART, pulse/frequency/binary |
| Communication |
Modbus RTU/TCP, BACnet, Profibus PA, Foundation Fieldbus (options) |
| Hazardous Area |
FM Class I Div 2, ATEX/IECEx Zone 2 (depending on version) |
| Media Temperature |
Typically -40 to +200 °C (extended ranges available with special transducers) |
Application Industry
Used in chemical, petrochemical, oil and gas, pharmaceutical, semiconductor, water and wastewater, energy management, mining, and general process industries for non-intrusive liquid flow measurement.
Common Problems
Intrusive meters often require process shutdown for installation or maintenance and can suffer from wear or clogging. The F731 avoids these issues through external clamp-on mounting, zero-point stability, and independence from pipe material, pressure, and fluid properties within its specified limits.
Replacement Models
Suitable as a modern non-intrusive alternative or upgrade for earlier Flexim FLUXUS models and other clamp-on or intrusive liquid flowmeters in similar applications.
Why Buy From Us
We supply genuine Flexim / FLUXUS instruments and assist with correct transducer selection and application matching for reliable long-term performance.
Stock & Delivery Time
Typical production and delivery time is 6-8 weeks.
RFQ Form
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