The UF 201 is a wall-mounted, clamp-on ultrasonic flow meter based on the transit-time measurement principle. Designed with an advanced FPGA chip and low-voltage broadband pulse transmission technology, it delivers accurate and stable flow measurement without pipe cutting or process interruption. Both clamp-on and insertion-type sensors are available to suit different installation requirements.
It features a 240 × 128 backlit LCD with a four-line menu display. The intuitive, user-friendly interface allows quick configuration and convenient operation. The meter supports daily, monthly, and yearly flow totalization, as well as simultaneous positive, negative, and net flow measurement. Pulse and frequency outputs are available via relay and open collector for easy system integration.
By adding RTD and temperature sensors, It can be upgraded to an energy meter for thermal energy monitoring. This enables users to analyze energy consumption, optimize system efficiency, and support energy-saving initiatives.
Flow Meter Description
Ultrasonic Flow Meter Features
Easy installation with minimal downtime
Clamp-on design allows installation without pipe cutting or process shutdown, significantly reducing installation time and overall system cost.
No pressure loss and maintenance-free operation
Non-intrusive measurement introduces no pressure head loss and has no moving parts, eliminating mechanical wear and routine maintenance.
Optional BTU / energy measurement function
With RTD and temperature sensors, the UF 201 can be configured as a portable ultrasonic energy meter for heating and cooling energy monitoring.
Advanced data storage and analysis capability
Supports large-capacity data storage and is compatible with data logging and analysis software, enabling detailed flow and energy consumption evaluation.
Ultrasonic Flowmeter Applications
Ultrasonic flow meters are widely used across industries where non-contact or low-maintenance flow measurement is required:
Water supply and wastewater treatment
HVAC and energy management systems
Power plant cooling water and condensate
Chemical and pharmaceutical processes
Oil & gas liquid measurement
Large-diameter pipeline flow monitoring
Portable and temporary flow measurement
Ultrasonic Flowmeters Working Principle
Ultrasonic flow meters operate based on the transit-time principle. Two ultrasonic transducers alternately transmit and receive signals upstream and downstream. When fluid flows, the ultrasonic signal traveling in the flow direction moves faster than the signal traveling against the flow.
The time difference between upstream and downstream signals is proportional to the flow velocity. By calculating this time difference, the flow meter accurately determines the volumetric flow rate of the liquid.
Flow Meter Ultrasonic Structure & Interface Design
The UF 201 ultrasonic flow meter features a 240 × 128 backlit LCD with a clear four-line menu display, providing excellent readability in industrial environments. The intuitive, user-friendly menu structure allows fast parameter setup and simple operation, reducing commissioning time.
The instrument supports daily, monthly, and yearly flow totalization, with simultaneous calculation of positive flow, negative flow, and net flow. Scale factor (span) adjustment and BTU capacity calculation are available to meet different measurement and energy monitoring requirements.
For system integration, the UF 201 provides totalized pulse output and frequency output, transmitted via relay and open-collector interfaces, enabling flexible connection to PLC, DCS, and data acquisition systems.
Flow Meter Parameter
| Category | Parameter | Specification |
|---|---|---|
| Model | — | UF 201 |
| Performance | Flow Velocity Range | ±0.09 ft/s ~ ±16 ft/s (±0.03 m/s ~ ±5 m/s) |
| Accuracy | ±1% of measured value | |
| Repeatability | 0.2% of measured value | |
| Linearity | ±1% | |
| Pipe Size | 1″ ~ 48″ (25 mm ~ 1200 mm); sizes below 1″ available as option | |
| Applicable Fluid | Water | |
| Function | Analog Output | 4–20 mA, max load 750 Ω |
| Pulse Output | 0 ~ 10 kHz | |
| Communication | RS232 / RS485 (Modbus) | |
| Power Supply | 10 ~ 36 V DC, 1 A | |
| Display | 240 × 128 backlit LCD | |
| Environmental | Transmitter Temperature | -14 °F ~ 140 °F (-20 °C ~ 60 °C) |
| Transducer Temperature | -40 °F ~ 176 °F (-40 °C ~ 80 °C, standard) | |
| Humidity | Up to 99% RH, non-condensing | |
| Physical | Transmitter Enclosure | PC / ABS, IP65 |
| Transducer Enclosure | ABS, IP68 | |
| Design | Encapsulated design | |
| Transducer Cable | Double-shielded cable | |
| Cable Length | Standard 30 ft (9 m); maximum 900 ft (274 m) |
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Related Product Recommendations
Can ultrasonic flow meters measure accurately in the presence of air bubbles?
Ultrasonic flow meters can tolerate a limited amount of entrained air or microbubbles. However, excessive air content may attenuate the ultrasonic signal. Proper sensor positioning and sufficient straight pipe sections help maintain stable measurement in bubble-prone applications.
Are ultrasonic flow meters suitable for large-diameter pipelines?
Yes. Ultrasonic flow meters are particularly suitable for large-diameter pipes where traditional flow meters become difficult or expensive to install. Clamp-on ultrasonic sensors allow non-intrusive measurement on pipes up to several meters in diameter.
How does low flow velocity affect ultrasonic flow measurement?
At very low flow velocities, the transit-time difference becomes smaller, which may affect measurement resolution. Selecting appropriate sensor spacing and ensuring good acoustic coupling improves accuracy in low-flow applications.
Do ultrasonic flow meters require pipe cutting or process shutdown?
No. Clamp-on ultrasonic flow meters are installed externally on the pipe and do not require pipe cutting, welding, or process interruption, making them ideal for retrofit and temporary measurement tasks.
Can ultrasonic flow meters measure flow in partially filled pipes?
Ultrasonic flow meters are designed for full-pipe flow conditions. For partially filled or open-channel applications, alternative ultrasonic level or flow measurement technologies should be considered.
Are ultrasonic flow meters affected by pipe material and lining?
Yes. Pipe material, wall thickness, and lining can influence ultrasonic signal transmission. Most metallic and plastic pipes are supported, but proper parameter configuration is required to ensure reliable measurement.
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