Introduction

In high-precision manufacturing, maintaining process purity, consistency, and accuracy is vital. Whether in semiconductor fabrication, biotechnology, or precision chemical processing, the ability to precisely measure fluid flow determines overall process quality. Among modern flow measurement methods, ultrasonic technology has emerged as one of the cleanest and most reliable solutions — ideal for industries that cannot tolerate contamination or downtime.

Understanding Ultrasonic Flow Measurement

Ultrasonic flowmeters measure flow rate by transmitting high-frequency sound waves through the pipe wall and liquid. By calculating the time difference between the upstream and downstream signals, the device determines the velocity and flow of the medium.

Key advantages include:

• Non-contact measurement: The transducers are mounted externally, eliminating any risk of contamination or fluid leakage.
  
• Zero pressure loss: Because the pipe remains unobstructed, there is no flow restriction or energy loss.
  
• Versatile compatibility: Applicable to various pipe materials — metal or resin — and a broad range of liquids such as water, chemical solutions, or coolants.
  
• Low maintenance: With no moving or wetted parts, ultrasonic flowmeters minimize wear and ensure long-term stability.
  

These characteristics make ultrasonic flowmeters the preferred choice for clean environments where reliability, accuracy, and uptime are essential.

CHELIC FN-V Series: Compact, Accurate, and Non-Intrusive

At TAIWAN CHELIC CO., LTD., we have combined years of pneumatic and automation expertise with advanced sensing technology to create the FN-V Series Clamp-On Ultrasonic Flowmeter — a compact, easy-to-install device designed for clean, efficient measurement.

The FN-V Series measures flow without cutting the pipe or contacting the fluid, ensuring system integrity and zero contamination.

It accommodates pipe outer diameters from Ø13 mm to Ø64 mm (DN08 – DN50), making it suitable for both small laboratory lines and industrial process systems.

Technical highlights:

• High measurement accuracy: ±2 % F.S. from 10 % – 100 % range, ±1 % F.S. below 10 %; repeatability ±0.8 % F.S.
  
• Selectable response time: 0.5 – 10 seconds for adaptive process control.
  
• Environmental protection: IP65 / IP67 rating with operating temperature −20 °C to +60 °C.
  
• Fluid compatibility: Water, solutions, and chemical liquids (impurity ≤ 4 %, viscosity < 300 cSt).
  
• Wide fluid temperature range: 0 °C – 85 °C (pipe surface not frozen).
  
• Multi-signal output: Analog (1 – 5 V / 0 – 10 V / 4 – 20 mA / 0 – 20 mA), RS-485, switch (NPN / PNP), and relay output for versatile process feedback.
  
• Optional expansion connector: Allows connection to pressure or level sensors for integrated monitoring.
  
• No clogging, no corrosion, and no pressure loss — ensuring a stable, long-term flow solution.
  

Applications in High-Precision Industries

1. Semiconductor Manufacturing:In wafer fabrication, ultra-pure water (UPW) and chemical delivery systems must maintain absolute cleanliness. The FN-V’s clamp-on design prevents contact contamination, while its high precision ensures consistent flow during cleaning, etching, and coating processes.
   
2. Biotechnology and Pharmaceutical Production:For sterile production lines using purified water and buffer solutions, the FN-V provides a hygienic, non-intrusive flow-monitoring method compliant with GMP cleanroom standards.
   
3. Precision Cooling and Process Equipment:High-value machinery — such as lithography tools, lasers, and CNC equipment — requires precise coolant flow control. The FN-V’s fast response and high repeatability protect against thermal deviations and flow interruptions.
   
4. Chemical and Environmental Systems:Its broad liquid compatibility allows accurate monitoring in chemical dosing, wastewater treatment, and corrosive-fluid transport, supporting safe and efficient operations.
   

Advantages for Clean and Smart Manufacturing

As modern industries evolve toward data-driven and contamination-free production, the FN-V provides a clean, flexible measurement platform that supports process optimization and automation.

Key benefits:

• Real-time flow monitoring with selectable response speeds
  
• Non-contact measurement for zero contamination
  
• Compact and lightweight body for space-constrained installations
  
• Multi-signal outputs and optional expansion port for enhanced process control
  

Together, these features make the FN-V a cornerstone technology for high-precision industries pursuing clean and intelligent manufacturing.

Conclusion

The CHELIC FN-V Series Clamp-On Ultrasonic Flowmeter redefines clean measurement with its combination of precision, flexibility, and non-intrusive design.

By eliminating contamination risks, ensuring high accuracy, and supporting multi-signal connectivity, it delivers dependable flow monitoring for semiconductor, biotech, and precision-machinery environments.

If your production requires a reliable, maintenance-free, and contamination-resistant flow solution, the FN-V Series offers the clean technology advantage that modern manufacturing demands.

Contact CHELIC today to learn how the FN-V Series can enhance your flow-control systems.