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Yunyi has engaged in the research and development of pressure, liquid level, flow, and temperature sensors and transmitters, as well as their solutions. Providing OEM & ODM and custom design services

YUNYI ultrasonic flow meter

Acoustic Flow Detection · Unobstructed Precision — The Cross-Boundary Expert in Flow Measurement

YUNYI Ultrasonic flow meters are advanced instruments that measure flow velocity by utilizing the physical properties of ultrasonic waves propagating through fluids. They transmit and receive ultrasonic signals via sensors (transducers) mounted on the pipe wall or inserted into the pipe. By measuring the time difference between upstream and downstream propagation (time-of-flight method) or Doppler frequency shift (Doppler method), they precisely calculate the fluid’s average velocity and volumetric flow rate. Due to its unique advantage of non-contact measurement elements, it serves as the ultimate solution for challenges such as corrosion, expensive media, large-pipe measurements, and installation without production shutdown.

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ultrasonic flow meter

Product Advantages
The core value of ultrasonic flowmeters lies in the unparalleled flexibility, safety, and cost-effectiveness delivered by their “non-contact” measurement method.
1. Non-contact measurement with zero pressure loss: Sensors are mounted externally on pipes without contacting the fluid, eliminating pressure loss entirely for significant energy savings. This also prevents corrosion, contamination, and wear, ensuring exceptionally long service life.
2. Extremely broad media compatibility: Measures conductive and non-conductive, corrosive and non-corrosive liquids, gases, and steam. A single meter serves multiple purposes, with an application range far exceeding electromagnetic, vortex, and other flow meters.
3. Installation and maintenance without production interruption: Supports live-line installation (clamp-on type), eliminating the need for pipeline cutting or production shutdowns. This significantly reduces installation costs and production downtime losses, making it particularly suitable for retrofit projects.
4. Exceptional cost-effectiveness for large diameters: For large-diameter pipelines above DN300, its cost is far lower than that of electromagnetic flowmeters or venturi tubes of equivalent diameter. Its cost-performance ratio becomes increasingly advantageous as pipe diameter increases.
5. Portable Mobile Measurement: Offers a handheld model compatible with sensors of various materials and sizes. Like a stethoscope, it enables on-demand temporary flow checks, comparisons, or inspections—a powerful tool for flow diagnostics.
6. Multifunctional and Intelligent: A single host unit stores multiple pipeline parameters and adapts to different sensors. Features self-diagnostics to evaluate signal quality and installation status, supporting diverse output and communication protocols.

Core Application Areas
✅ Water and Water Management: Raw water/treated water/wastewater flow measurement, pipeline leakage detection, pump performance evaluation, hydrological monitoring.
✅ Petrochemical Industry: Flow measurement of crude oil, refined oil products, and chemical feedstocks (corrosive media) without interrupting process flow.
✅ Heating and Cooling: Energy metering and system balancing for hot water, refrigerants, and coolants in heating networks.
✅ Industrial Process Control: Energy consumption monitoring and cost allocation for compressed air, nitrogen, steam, and other industrial media.
✅ Special Media Measurement: High-purity pharmaceutical solutions, alcoholic beverages, and beverages in hygienically sensitive applications; slurries, muds, and other impurity-containing fluids.

Technical Specifications
1. Measurement Principle: Time-of-Flight Method (for clean liquids/gases), Doppler Method (for slurries containing bubbles/particles)
2. Accuracy: ±1.0% of reading (Time-of-Flight Method, post-calibration), ±2.0-5.0% of reading (Doppler method)
3. Installation Methods:
Clamp-on: V-method, Z-method, W-method (mounted externally on pipe, most flexible)
Insertion: Installed via pipe borehole, higher accuracy, preferred for permanent installation
Pipe Section: Factory calibrated, plug-and-play, highest accuracy
4. Applicable Pipe Diameters: DN15 ~ DN6000+ (nearly full coverage)
5. Output Signals: 4-20mA, Frequency/Pulse, Relay Alarm, RS485 (Modbus), HART
6. Power Supply: 85~265V AC or 16~36V DC, Built-in Lithium Battery (Portable)

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