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Keyence Ultrasonic Flow Meter: High-Precision Clamp-On Series and Practical Use Cases
Quick Answer: The Keyence clamp-on ultrasonic flow meter series, especially the FD-Q model, measures liquid flow from outside the pipe. No process shutdown is needed. Accuracy reaches ±2.0% of reading on clean fluids in metal or plastic pipes from DN15 to DN200. Silver Instruments helps you select clamp-on flow meters that match this performance, often at a lower total cost. Share your pipe size, wall thickness, and fluid type to get a specific quote.
How the FD-Q Clamp-On Sensor Works
Keyence uses an ultrasonic transit-time method with a clamp-on transducer pair. The sensors transmit high-frequency sound pulses through the pipe wall and the liquid. The difference in transit time between upstream and downstream signals gives a direct flow velocity reading. Because the sensor does not contact the fluid, it avoids corrosion and pressure loss. In practice, we have seen customers install the FD-Q on a DN40 PVC pipe running demineralized water at 25°C and 2 bar. The unit displays flow rate in L/min and totalized volume.
Key Specifications That Matter on Site
Pipe size range: DN15 to DN200 is typical for the standard FD-Q sensor. For larger pipes, you need a different setup. Fluid temperature limits: -10°C to 85°C, which covers most CIP cycles and cooling water loops. Output options include 4-20 mA, pulse, and RS-485 Modbus. You can integrate the meter with a PLC or a local HMI. A paint factory in Indonesia monitored solvent flow with a 4-20 mA signal straight to their DCS. The repeatability is tight, ±0.5% of reading, good enough for batching and leak detection.
Where Clamp-On Flow Meters Solve Real Problems
Wastewater lift stations in Australia often use clamp-on meters on DN150 HDPE pipes where cutting is expensive. A seawater cooling line in a Middle East LNG plant ran a temporary FD-Q to check pump output without process interruption. Food and beverage plants measure CIP chemical flow inline, using the meter as a portable audit tool. In these jobs, the quick mounting and non-invasive design are the real selling points.
Silver I
Here is the thing. The Keyence FD-Q is a solid instrument, but lead times and regional pricing can be a pain for project buyers in Africa, Southeast Asia, and Latin America. Silver Automation Instruments supplies factory-calibrated clamp-on ultrasonic flow meters with similar pipe range and output options. Our meters support DN15 to DN600 without cutting the pipe. We configure the meter for your exact fluid and pipe material before shipment. Send us your pipe outer diameter, wall thickness, fluid type, and temperature. You will get a technical proposal within one working day.
Contact Silver Instruments today:
Email: [email protected]
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
Frequently Asked Questions
1. Can the Keyence clamp-on meter measure sludge or high-solid fluids?
Clamp-on ultrasonic meters work best with clean liquids. Suspended solids or bubbles weaken the signal. If your fluid has over 1% solids, consider an electromagnetic flow meter. Silver Instruments can help you choose.
2. What pipe materials are compatible?
Standard clamp-on sensors work with carbon steel, stainless steel, PVC, and copper. Concrete-lined pipes and fiberglass need a site test. Always confirm the acoustic coupling condition.
3. Do I need straight pipe runs?
Yes. For most clamp-on meters, you need 10 diameters upstream and 5 diameters downstream. A straight run of 15 x DN is safer if you have a control valve or elbow close by.
4. How often does the clamp-on sensor need recalibration?
The Keyence FD-Q holds its calibration well under stable conditions. We recommend a field check every 12 months. If you move the sensor to a different pipe, you must re-enter the parameters and possibly do a zero check.
5. Can I get a price for a Keyence FD-Q and a comparable Silver Instruments meter?
Yes. We do not publish list prices because each application is different. Tell us your flow range, pipe size, and fluid, and we will quote both options for your review. Contact [email protected].
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