Clamp-on Ultrasonic Flow Meter
Measures pure liquids without pipe cutting, ideal for non-invasive measurement of relatively clean liquid flow. Widely used in water flow measurement,...
Key Features
Performance Metrics
| Flow Velocity Range | 0.01m/s ~ 5.0 m/s |
| Humidity | Relative humidity 0~99%, non-condensing |
| Repeatability | ±0.2% |
| Power Supply | (10~36) VDC, 1A |
Key Features
Clamp-on Ultrasonic Flow Meter Overview
The clamp-on ultrasonic flow meter is a non-invasive flow measurement instrument that measures relatively clean liquids without any pipe cutting. Using the ultrasonic time-of-flight principle with accuracy up to 1.0%, the clamp-on ultrasonic flow meter covers pipelines from DN15 to DN6000 and suits various pipe materials and diameters. The external clamp-on probe attaches directly to the pipe wall and is ready to use upon installation, making this clamp-on ultrasonic flow meter ideal for water flow measurement, industrial circulating water, air conditioning chilled water, raw water, high-pressure water and tap water applications. It also serves heating and warmth supply, municipal water supply, and mobile multi-point measurement scenarios. It features strong anti-interference capability, stable and reliable operation, rich interfaces, portable operation, simple maintenance and an IP65 protection rating.
Working Principle of the Clamp-on Ultrasonic Flow Meter
The clamp-on ultrasonic flow meter utilizes the ultrasonic time difference principle to measure flow. When an ultrasonic beam propagates through a liquid, the flow of the liquid causes a slight change in the propagation time, and the change in propagation time is proportional to the flow velocity of the liquid. At zero flow, the time required for the two sensors to transmit and receive sound waves is the same. When the medium is flowing, the sound wave transmission time in the counter-flow direction is greater than that in the downstream direction, and the instrument calculates flow velocity from this difference. The clamp-on ultrasonic flow meter employs advanced multi-pulse technology, signal digital processing technology and error correction technology, making it more adaptable to industrial site environments and enabling more convenient, economical and accurate measurement. As a result, it achieves advanced levels both domestically and internationally, with good stability, low zero drift, high measurement accuracy, wide range ratio and strong anti-interference capability.
Key Features of the Clamp-on Ultrasonic Flow Meter
The clamp-on ultrasonic flow meter combines non-invasive installation with robust signal processing:
- Utilizes the ultrasonic time-of-flight principle with measurement accuracy up to 1.0%.
- No pipe cutting required and flexible installation: the external clamp-on probe is attached to the pipe without opening it and is ready to use upon installation.
- Strong anti-interference capability with stable and reliable operation, good stability, low zero drift, wide range ratio and rich interfaces.
- Suitable for various pipe materials and diameters, covering pipelines from DN15 to DN6000, including large-diameter pipelines and media that are difficult to access and observe.
- Portable operation, simple maintenance and a large screen display with intuitive operation.
- IP65 protection rating.
- Optional heat metering function available, supporting heating efficiency evaluation in the heating and warmth supply industry.
Technical Specifications of the Clamp-on Ultrasonic Flow Meter
Measurement Principle
Time-of-flight / Time difference
Accuracy
Up to 1.0%
Pipe Diameter Range
DN15 – DN6000
Sensor Type
External clamp-on probe
Protection Rating
IP65
Signal Technology
Multi-pulse, digital processing
- Pipe material compatibility: suitable for various pipe materials and diameters
- Performance: good stability, low zero drift, wide range ratio, strong anti-interference capability
- Display: large screen display, intuitive operation
- Interfaces: rich interfaces
- Optional function: ultrasonic heat metering
- Operation: portable operation, simple maintenance
Applications of the Clamp-on Ultrasonic Flow Meter
The clamp-on ultrasonic flow meter is widely used in water flow measurement and municipal water supply, where tap water and raw water lines can be monitored without shutting down the pipeline. It is equally suited to industrial circulating water systems and air conditioning chilled water loops, where process interruptions are costly and pipe cutting is impractical. In heating and warmth supply networks, the optional ultrasonic heat metering function helps operators evaluate heating efficiency. Because the clamp-on ultrasonic flow meter can measure media in large-diameter pipelines as well as media that are difficult to access and observe, it solves flow measurement problems that other instruments cannot handle without opening the pipe, and its portability makes it a practical tool for mobile multi-point measurement across a plant or a distribution network.
Installation and Maintenance of the Clamp-on Ultrasonic Flow Meter
Installing the clamp-on ultrasonic flow meter requires no pipe cutting, no process shutdown and no contact with the liquid: the sensor is simply attached to the pipe exterior. Choose a straight pipe section with stable, full-bore flow, and select a mounting position that represents the measured medium, such as a section away from pumps and valves that disturb the flow profile. Pair the probe setup with the actual pipe material, diameter and wall condition so the ultrasonic signal propagates cleanly through the pipe wall into the liquid. With no parts inside the pipe, routine maintenance of the clamp-on ultrasonic flow meter is simple: verify the probe mounting, check the cable connections and confirm the display readings, which keeps long-term operation stable and economical. For mobile multi-point measurement tasks, the portable operation of the clamp-on ultrasonic flow meter lets one device serve many measurement points in sequence, reducing the need to install dedicated meters at every location.
Installation Guidance and Signal Quality for the Clamp-on Ultrasonic Flow Meter
Correct probe mounting is the key to stable measurement with a clamp-on ultrasonic flow meter. The pipe wall should be cleaned of rust, scale, and insulation at the mounting position, and coupling gel applied between each transducer and the pipe to ensure reliable ultrasonic signal transmission. Upstream and downstream straight pipe runs should be kept as long as the site allows, because a well-developed flow profile directly improves measurement repeatability. Pipe material, wall thickness, and diameter are entered through the large screen display, and the meter guides the operator to the recommended transducer spacing.
Once configured, the non-invasive design keeps maintenance minimal: there are no wetted parts to wear out, no process shutdown for inspection, and portable operation allows one meter to serve multiple measurement points in rotation. For heating and chilled water systems, the optional heat metering function derives energy flow from the measured volume flow, supporting both billing verification and efficiency audits without additional instruments.
? Reference Sources
- Product technical documentation – Clamp-on Ultrasonic Flow Meter specifications
- Ultrasonic time-of-flight measurement principles – industry reference materials
- Application case studies – water supply, HVAC, and industrial circulation systems
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