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Keyence Clamp-On Ultrasonic Flow Meter FD-H63F: Complete Specifications and Calibration
Quick Answer
The FD-H63F clamp-on ultrasonic flow meter from Keyence delivers non-intrusive measurement on pipes from DN50 to DN600. It achieves ±1.0 % of reading accuracy with built-in temperature compensation, and you can install it without cutting pipes or stopping flow. Silver Automation Instruments stocks this model and performs calibration for water, chemical, and HVAC projects in Southeast Asia and the Middle East.
Full Technical Specifications of the Keyence FD-H63F
The FD-H63F sensor heads clamp directly onto the outside of metal or rigid plastic pipes. The transmitter accepts pipe outer diameters from 50 mm to 600 mm (DN50–DN600). Wall thickness limits range from 1.6 mm to 30 mm depending on material. The flow velocity range is 0 to ±12 m/s. Standard accuracy is ±1.0 % of reading for velocities above 0.3 m/s. Repeatability sits at ±0.2 %. The unit runs on 100 to 240 V AC or 24 V DC. Outputs include one 4-20 mA analog channel, one open-collector pulse, and RS-485 Modbus RTU. The backlit LCD displays flow rate, total flow, and velocity in real time.
The IP67 transmitter enclosure handles outdoor mounting even in monsoon rain. Standard probes work with liquid temperatures from -20 °C to +100 °C. High-temperature clamp-on transducers extend this range to +200 °C. For thermal energy metering, we often pair the FD-H63F with clamp-on PT100 sensors on chilled water lines.
Calibration and On-Site Verification
The factory calibration uses a reference meter traceable to national standards. Keyence stores the calibration coefficients directly in the transmitter memory. Because ultrasonic transit-time measurement relies on pipe geometry input, you do not need a wet flow loop for recalibration. In practice, most engineers skip the full recalibration if the pipe wall thickness and material data are accurate.
Here is the thing: for custody transfer or ISO 9001 audits, we recommend an annual verification against a portable clamp-on reference meter. Silver Instruments offers calibration certificates through a NATA-equivalent partner lab in Australia. Customers in Vietnam and Indonesia often send us data logs. We check the signal waveform, sound speed deviation, and received signal strength, then recommend a zero offset adjustment remotely if needed. A paint manufacturer in Thailand did exactly this last year after replacing an old inline magmeter with the FD-H63F on a 4-inch stainless steel solvent line. The verification showed a deviation of only 0.35 % after 14 months of continuous operation.
Common Applications and Use Cases
The FD-H63F works across many industries because it never touches the fluid. Typical applications include chilled water and hot water loops in commercial buildings, municipal wastewater lift stations, chemical transfer lines for sulfuric acid and sodium hy
We have seen many cases where a clamp-on meter solved a problem fast. One food-grade alcohol producer in the Philippines measured flow on a DN150 schedule 10 stainless pipe without any process shutdown. They just strapped the transducers on, entered the pipe parameters, and started logging Modbus data to their PLC within one hour.
How to Order and Get a Quote from Silver Instruments
Send us your pipe material, outer diameter (mm), wall thickness, fluid type, flow range in m³/h or L/min, and operating temperature (°C). Tell us if you need 4-20 mA or Modbus RTU output. For a fast quotation, email [email protected]. You can also reach us on WhatsApp at 86-135-12131526, call +86-135-1213-1526, or add our WeChat: +86 13512131526. Our application engineers usually reply within one working day with a complete datasheet, price, and shipping cost to your port in Singapore, Dubai, Sydney, or wherever you need it.
Frequently Asked Questions
Can the FD-H63F measure flow on old or corroded pipes?
Yes, if the pipe wall is not heavily pitted. We suggest cleaning a small flat spot for transducer mounting and using the included acoustic coupling gel. Excessive internal scaling may reduce signal strength, but the transmitter shows a signal quality indicator so you can reposition the sensor for the best reading.
What is the minimum straight pipe length required?
For the FD-H63F, we advise 10 diameters upstream and 5 diameters downstream from any elbow, tee, or control valve. If space is tight, a flow conditioner or dual-path configuration can reduce the required straight run.
Does this model support bi-directional flow measurement?
Yes. The transmitter detects reverse flow and displays a negative value. The 4-20 mA output can be scaled for both directions, and the pulse output has a separate totalizer for reverse flow.
Can I use it on a partially filled pipe?
No. Ultrasonic clamp-on meters require a fully filled pipe with no air pockets or bubbles. Install the sensor on a vertical pipe with upward flow or on a descending horizontal section to ensure the pipe stays full.
How often should I recalibrate?
For general process monitoring, an annual signal check is enough. For billing or regulatory applications, verify the meter against a traceable portable standard every 12 months. Silver Instruments can supply a rental clamp-on reference meter and calibration support if you do not have one on site.
For technical support, datasheets, or a detailed calibration procedure for the Keyence FD-H63F, reach out to [email protected] or call +86-135-1213-1526. We ship to Southeast Asia, Oceania, the Middle East, Africa, and Latin America.
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