In industries with extremely high cleanliness requirements, such as biopharmaceuticals, even the slightest contamination can have a significant impact on production processes and product quality. In the biopharmaceutical process, contaminants can not only compromise the quality of drugs but also pose a threat to their safety. Therefore, these industries impose strict requirements on the cleanliness of fluids.

At the same time, precise flow control is also a key demand in these industries. Variations in liquid flow can affect production efficiency and may directly impact the final quality of the products.
With the development of modern industrial technology, flow measurement technologies have diversified. However, due to limitations in measurement principles, many flow measurement technologies exhibit significant constraints in these high cleanliness applications.

For instance, rotor flow meters can contaminate the measured medium with their floats.

Turbine flow sensors have sliding shafts that require fluid lubrication, leading to mechanical wear; thermal flow meters can directly affect the temperature of the measured liquid during heating; vortex flow sensors are unable to measure low flow rate fluids; and electromagnetic flow meters rely on conductive media to operate, whereas ultrapure water has extremely low conductivity, making it impossible to provide stable measurement results. Although Coriolis mass flow meters offer high measurement accuracy and are not affected by the density or viscosity of the medium, they are expensive.

In contrast, non-contact ultrasonic flow sensors avoid direct contact with the fluid through their external clamp design, effectively reducing the risk of contamination. They measure fluid velocity by using ultrasonic waves that penetrate the tubing wall, ensuring measurement accuracy while maintaining the purity of the medium. As a result, ultrasonic flow sensors stand out as the ideal choice for applications that require high cleanliness and precise control.

Working Principle of Ultrasonic Flow Sensors

Ultrasonic flow sensors measure the flow velocity of fluids by using the time difference of ultrasonic wave propagation. The TFF is based on the fact that ultrasonic waves travel at different speeds in the downstream and upstream directions—faster with the flow and slower against it. By comparing the time difference of two beams of sound waves, the flow rate of the liquid can be calculated.

Since ultrasonic waves can penetrate the pipe wall, the flow sensor can complete measurements without direct contact with the liquid, avoiding any impact on the physical or chemical properties of the fluid. Moreover, this non-contact measurement method maintains high accuracy under various flow conditions, making it particularly suitable for demanding applications in biopharmaceutical industries.

Advantages of Xunyin Technology's External Clamp Ultrasonic Flow Sensors

XY-TEK non-invasive clamp on ultrasonic flow sensors not only address the limitations of other sensors but also offer numerous performance advantages:

1. Non-Contact Design, Avoiding Cross-Contamination
The external clamp design allows the sensor to be installed outside the tubing, avoiding contact with the liquid during measurement and effectively reducing contamination risks.

2. High Precision and Repeatability
In applications that require precise flow control, such as drug or chemical liquid delivery processes, the high accuracy of the flow sensor is crucial.

3. Low Pressure Loss, Uninterrupted Medium Flow
The internal structure of the flow sensor does not create any obstructions, allowing the fluid to flow freely without causing pressure drops or flow resistance.

4. Low Maintenance Costs, Easy Operation
The external clamp ultrasonic flow sensor does not require downtime for replacement or product upgrades, eliminating the need to cut off tubing and greatly reducing the impact on the production process. Additionally, the sensor has no moving parts, significantly reducing mechanical wear and maintenance costs.

5. Real-Time Monitoring and Communication Functions
The flow sensor is equipped with powerful data recording and communication capabilities, allowing users to monitor flow data in real time, ensuring transparency and traceability in the production process. It supports various communication interfaces, facilitating integration into existing smart systems.

Conclusion

With the rapid development of the integrated circuit industry and the biopharmaceutical sector, the demands for cleanliness and flow accuracy are increasing. Consequently, the market demand for non-contact flow measurement technology is also growing rapidly.

XY-TEK non-invasive clamp-on ultrasonic flow sensors provide a high-precision, low-maintenance flow measurement solution while ensuring fluid cleanliness through their non-contact design. They demonstrate exceptional performance and reliability. As technology continues to evolve, XY-TEK non-invasive clamp-on ultrasonic flow sensors will play a key role in more scenarios requiring high cleanliness and high precision measurement.

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