Handheld Ultrasonic Flow Meter | Portable Transit-Time Meter | FMU830
The FMU830 is a compact, high-precision handheld ultrasonic flowmeter designed for non-invasive liquid flow diagnostics across industrial pipelines. Featuring a rugged die-cast aluminum housing, an intuitive backlit LCD display, and an internal rechargeable battery offering over 12 hours of continuous field operation, the FMU830 delivers immediate clamp-on measurement without cutting pipes or interrupting system flow.
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Wide Pipe Range: Supports nominal diameters from DN15 to DN6000.
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High Accuracy: Indication value +/-1% for flow rates greater than 0.2 m/s.
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Built-in Data Logger: Stores up to 2,000 rows of measurement data for rapid field verification.
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Non-Invasive Clamp-On Sensors: IP68-rated transducers for standard (-30°C to 90°C) and high-temperature (-30°C to 160°C) applications.
Description
High-Performance Portable Flow Verification
The FMU830 Handheld Ultrasonic Flowmeter represents the next generation of portable transit-time liquid flow measurement. Engineered for facility engineers, maintenance technicians, and environmental inspectors, the FMU830 allows for swift, non-contact flow auditing across metal, plastic, and composite piping systems without causing pressure drops or process downtime.
Built into a flame-retardant ABS protective shell over a durable die-cast aluminum host, the unit is lightweight, ergonomic, and resistant to harsh industrial site conditions. Its optimized low-power circuit architecture provides up to 12 hours of continuous operation on a single charge.
Non-Contact Clamp-On Technology
Utilizing advanced transit-time ultrasonic measurement principles, the FMU830 measures single, uniform liquid media such as potable water, seawater, industrial wastewater, cooling fluids, and refined oils. With quick-release aviation connectors and external magnetic clamp-on transducers, installation takes minutes.
Memory & Diagnostic Capabilities
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Data Storage: An internal data logger automatically records up to 2,000 data rows.
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Historical Totals: Automatic memory logs cumulative flow for the past 64 days, 64 months, and 5 years.
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Multi-Parameter Display: Simultaneously view positive, negative, and net cumulative flow, instantaneous flow rate, flow velocity, and signal status on a backlit LCD screen.
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Digital Communication: Standard RS232C interface supporting baud rates from 75 to 57,600 bps for seamless data transfer to PC host systems.
Features
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Non-Destructive Measurement: Clamp-on external sensors require no pipe cutting, drilling, or process shut-downs.
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Broad Pipe Diameter Coverage: Measures small to ultra-large pipelines ranging from DN15 mm up to DN6000 mm using appropriate sensor sizing.
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Extended Battery Life: Built-in rechargeable Ni-MH battery pack supports 12+ hours of uninterrupted field operation.
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High Precision: Delivers +/-1% accuracy across flow velocity ranges from -32 m/s to +32 m/s.
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Ruggedized Construction: Features an internationally advanced die-cast aluminum core with a flame-retardant ABS protective outer cover.
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Submersible Transducers: Standard clamp-on sensors feature IP68 ingress protection for operation in demanding environments.
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Quick Aviation Connectors: High-reliability air quick couplers enable fast sensor setup and teardown.
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Universal Media Compatibility: Compatible with over 30 pure liquids including water, oils, solvents, and chemical fluids.
Specification
| Parameter | Specification |
| Measurement Principle |
Transit-time ultrasonic flow measurement |
| Flow Velocity Range |
+/-32 m/s |
| Accuracy |
+/-1% of indication value (for flow rates > 0.2 m/s) |
| Pipe Diameter Range |
DN15 mm to DN6000 mm |
| Pipe Materials |
Carbon steel, stainless steel, cast iron, copper, PVC, aluminum, FRP, and other uniform sound-conducting materials |
| Applicable Liquids |
Water, seawater, sewage, plant oils, fuel oils, chemical solvents (>30 pure liquids) |
| Display |
Backlit LCD display ( instantaneous flow, cumulative flow, velocity, time, analog inputs) |
| Response Time |
0 to 999 seconds (selectable) |
| Data Logging |
Integrated data logger (stores up to 2,000 data rows) |
| Historical Memory |
Automatic recording of past 64 days, 64 months, and 5 years of cumulative flow |
| Signal Output |
1-channel OCT pulse output (pulse width 6–1000 ms, default 200 ms) |
| Communication |
RS232C interface (baud rate 75 to 57,600 bps) |
| Power Supply |
Built-in rechargeable Ni-MH battery (12+ hours) / 100-240 VAC power adapter |
| Protection Rating |
Main Host: IP67 (Flame-retardant ABS) / Transducers: IP68 |
| Medium Temperature |
Standard Transducers: -30°C to 90°C / High-Temp Transducers: -30°C to 160°C |
| Operating Temperature |
Host: -30°C to 90°C / Sensors: -30°C to 160°C |
| Dimensions & Weight |
Main Host: 100 mm x 66 mm x 20 mm |
FAQ
How does the FMU830 replace legacy handheld units like the UF2000H?
The FMU830 offers an updated electronic architecture with upgraded signal processing, improved battery life (over 12 hours), and extended pipe size compatibility (DN15 to DN6000). It uses standard transit-time technology while offering a rugged die-cast aluminum frame for field protection.
Can the FMU830 measure flow through lined or corroded pipes?
Yes, as long as the sound wave can pass through the pipe wall and liquid medium. For older or heavily scaled pipes, enter the actual remaining wall thickness into the host computer or account for scale as an internal pipe lining during setup.
What straight pipe runs are required for accurate measurement?
For optimal accuracy (+/-1%), locate the clamp-on sensors on a straight pipe section with at least 10 pipe diameters (10D) upstream, 5 pipe diameters (5D) downstream, and 30 pipe diameters (30D) from a pump outlet.
Does installing the FMU830 require stopping the flow or cutting the pipe?
No. The FMU830 uses non-invasive, external clamp-on transducers. Sensors attach directly to the exterior wall of the pipe using magnetic mounts or mounting straps, eliminating process shutdowns, line cutting, or pressure drops.
How do I export stored measurement data from the FMU830?
The host unit features a built-in data logger capable of storing 2,000 rows of data. Stored readings and real-time logs can be transferred to a computer or controller using the RS232C serial communication port.
