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Technical Specifications
| Measured variables | Directly measured variable: Flow rate Calculated measured variable: Volume flow | |
| Typical flow rate range | 0.3m/s~10m/s | |
| Nominal diameter | Clamp-on type: DN50~DN700 Insertion type: DN50-DN6000 | |
| Accuracy | ±1 % | |
| Resolution | 0.001m/s | |
| Repeatability | 0.2 % | |
| Operating frequency | 100Hz | |
| Response time | 0.2s | |
| Transmitter output | Output Type | (4~20)mA |
| Output accuracy | 0.1% FS | |
| Output Load | <500Ω | |
| Communication output | Output Type | RS485 |
| Communication | MODBUS | |
| Frequency/pulse output | Pulse Width | Self-adaptive |
| Pulse coefficient | Configurable | |
| Power supply | AC: (85-265) V DC: (10~30) V | |
| Power consumption | 2.5W | |
| Electrical interface | M20*1.5 | |
| Medium temperature | -30℃-90℃ | |
| Ambient temperature | -20℃-60℃ | |
| Storage temperature | -40℃-80℃ | |
| Protection level | IP65 | |
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Optional Functions & Expansion
Heat and cooling energy totalizing with temperature sensors
Fixed installation with wall-mounted remote transmitter
Suitable for flow monitoring, energy analysis, and industrial automation systems
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Applications
The Wall-Mounted Ultrasonic Flowmeter is widely used in:
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Petroleum and petrochemical industries
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Chemical processing plants
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Electric power and energy systems
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Food and beverage processing
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Industrial water and utility systems
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Heat consumption and energy management projects
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Measuring principle
The ultrasonic flowmeter operates based on the Transit-Time Difference Method. Two ultrasonic sensors are mounted upstream and downstream to alternately transmit and receive ultrasonic pulses through the fluid.
When the ultrasonic signal travels with the flow, the transit time is shorter; when traveling against the flow, the transit time is longer. The difference between these two transit times is proportional to the fluid velocity.
The average flow velocity and volumetric flow rate are calculated using the following relationships:
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tdu: Transit time from upstream sensor to downstream sensor
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tud: Transit time from downstream sensor to upstream sensor
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L: Acoustic path length
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X: Axial distance between sensors
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θ: Acoustic propagation angle
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vi: Average flow velocity
Based on these parameters, the system calculates instantaneous flow rate and totalized flow accurately and continuously.
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Installation Types
Clamp-on Ultrasonic Flowmeter
Clamp-on sensors are mounted directly on the outer surface of the pipeline, requiring no pipe cutting or process interruption. Installation is fast, simple, and completely non-intrusive, reflecting the ease of use and flexibility of ultrasonic flow measurement technology.
Insertion Ultrasonic Flowmeter
Insertion-type ultrasonic flowmeters can also be installed without shutting down the pipeline. Using special tools, sensors are inserted into the pressurized pipe. Since the ultrasonic signal travels only through the measured medium, the measurement is not affected by pipe wall thickness or lining materials, ensuring high accuracy.
