KEYENCE FD-Q Clamp-On Liquid Flow Sensor
| Brand | KEYENCE |
|---|---|
| Origin | Japan |
| Manufacturer Type | Manufacturer |
| Origin Category | Imported |
| Model | FD-Q |
| Pricing | Upon Request |
| Liquid Mass Flow Accuracy | ±0.15% |
Overview
The KEYENCE FD-Q Clamp-On Liquid Flow Sensor is an ultrasonic transit-time flow measurement device engineered for non-invasive, real-time monitoring of liquid mass flow in industrial process lines. Unlike intrusive flowmeters requiring pipe cutting, welding, or process shutdown, the FD-Q employs dual-sensor clamp-on transducers that acoustically couple to the exterior surface of metallic or thermoplastic pipes—enabling installation without pipeline modification, fluid contact, or system downtime. Its operating principle relies on precise time-of-flight differential measurement between upstream and downstream ultrasonic pulses traveling through the flowing medium; this transit-time difference is directly proportional to the average axial velocity of the liquid, which—when combined with known pipe geometry and fluid density—is converted into mass flow rate with high reproducibility. Designed for continuous operation in clean to moderately contaminated liquids—including deionized water, hydraulic oils, solvents, and aqueous chemical solutions—the FD-Q delivers traceable, calibration-stable performance compliant with fundamental metrological requirements for in-line process verification.
Key Features
- True clamp-on installation: No pipe penetration, no pressure loss, zero risk of leakage or contamination.
- Universal mounting compatibility: Validated for use on stainless steel, carbon steel, copper, PVC, PP, and PVDF pipes (wall thickness and material acoustic impedance permitting).
- Plug-and-play setup: Pre-configured monitoring modes accessible via intuitive QR-code-based initialization—eliminating need for specialized commissioning tools or engineering expertise.
- Real-time digital output: Simultaneous analog (4–20 mA) and digital (RS-485 Modbus RTU) interfaces support seamless integration into PLCs, SCADA systems, and MES platforms.
- High-accuracy mass flow measurement: ±0.15% of reading accuracy over a defined operational range (subject to proper sensor placement, pipe condition, and fluid homogeneity per ISO 6946 and ISO 17025 traceable calibration protocols).
- Rugged industrial enclosure: IP67-rated housing with temperature compensation circuitry ensures stable performance across ambient conditions from −10 °C to +60 °C.
Sample Compatibility & Compliance
The FD-Q is validated for homogeneous, single-phase liquids with minimum sound velocity ≥ 1,000 m/s and acoustic attenuation < 20 dB/m at 1 MHz. Compatible media include deionized water, glycol-water mixtures, mineral oils, silicone oils, ethanol, IPA, and diluted acids/bases—provided viscosity remains below 100 cP and suspended solids content is < 5 ppm. It is not intended for slurries, highly aerated fluids, or cryogenic applications. The sensor conforms to IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emissions), and its measurement methodology aligns with principles outlined in ISO 10790 (ultrasonic flowmeters for liquids) and ASTM D7320 (standard practice for field calibration of clamp-on ultrasonic flowmeters). While not certified for SIL or ATEX environments, it supports integration into GMP-compliant manufacturing processes where audit-ready documentation and configuration logs are required.
Software & Data Management
The FD-Q operates autonomously but supports remote configuration and diagnostics via KEYENCE’s proprietary FA Configurator software (Windows-based), which provides waveform visualization, signal quality assessment, and auto-optimization of transducer excitation parameters. All setup changes—including flow range, damping time, and alarm thresholds—are timestamped and stored locally with non-volatile memory retention. For regulated environments, the device supports optional firmware with GLP/GMP-compliant features: user-access-level control (admin/operator), electronic signature prompts for critical parameter changes, and exportable CSV-formatted event logs compatible with FDA 21 CFR Part 11 data integrity requirements when deployed with validated IT infrastructure.
Applications
- Monitoring coolant flow in semiconductor wet benches and wafer cleaning lines.
- Verifying dosing accuracy of reagents in pharmaceutical bioreactor feed systems.
- Tracking heat-transfer fluid circulation in HVAC and thermal management loops.
- Validating batch transfer volumes in food & beverage CIP/SIP pipelines.
- Leak detection and flow continuity assurance in sealed chemical distribution manifolds.
- Energy efficiency audits via real-time correlation of flow rate with pump power consumption.
FAQ
Does the FD-Q require pipe material certification prior to installation?
Yes—acoustic coupling performance depends on pipe wall material, thickness, and lining. KEYENCE provides a free online Pipe Compatibility Checker tool requiring nominal diameter, schedule, and base material input.
Can the FD-Q measure bidirectional flow?
No—it is unidirectional by design and must be installed with arrow orientation aligned to nominal flow direction.
Is recalibration required after initial setup?
No routine recalibration is mandated; however, periodic verification using a portable reference ultrasonic meter per ISO/IEC 17025 procedures is recommended annually or after mechanical impact to transducers.
What is the minimum straight-pipe run required upstream/downstream?
Zero—due to its external sensing principle, the FD-Q does not impose hydraulic straight-run constraints typical of orifice or magnetic flowmeters.
Does it support HART communication?
No—only 4–20 mA analog and RS-485 Modbus RTU are supported; HART requires additional signal conditioning hardware not integrated into the FD-Q architecture.
