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Clamp-on Micro Flow Sensor

FD-X series

Liquid Flow Meter Selection Site [ Get Started >]

Low Flow Monitoring from Outside the Pipe


Spraying / Coating


Filling / Dosing / Injecting

Cooling / Lubricating


Utilize Everywhere

- Detect flow rates as low as 0.1 mL/min or shot amounts as low as 0.001mL
- Any liquid flow rate can be monitored including:
Viscous greases, chemicals, and sanitary liquids
- Compatible with metal pipes and resin tubes from 0.12"-0.5"

Learn more in the catalog

Zero Impact on Process

- Simply clamp the flow sensor to any pipe or tube
- Completely non-invasive
- No machine downtime or risk of clogging, pressure loss, or contamination

Learn more in the catalog

Quick Data Retrieval

- Export liquid usage data to PC via USB connection
- Communicate with the FD-X over various platforms such as Ethernet/IP, CC-Link, DeviceNet, etc
- IO-Link compatible

Learn more in the catalog


  • NU series - Network Communication Unit

    Compatible sensors are photoelecttric sensor PS-N series, fiber sensor FS-N series and laser sensor LV-N series.

  • FD-Q series - Clamp-on Flow Sensor

    Compatible with a variety of pipe materials and liquids, the FD-Q Series Clamp-on Flow Sensor can detect the flow rate of a liquid without the need for any pipe modification. This device enables the detection of a wide variety of liquids, including water (and pure water), oil, and chemicals. Detection is possible on both metal and resin pipes up to 2" in diameter. Unlike conventional sensors, installation and operation are also easy on high-pressure pipes. Costs are significantly reduced with the minimal installation required and the completely non-wetted design eliminates the risk of pressure loss or increased maintenance. Additionally, the large indicator provides real-time status information.

  • FD-R series - Clamp-on Flow Meter

    KEYENCE's FD-R Series Clamp-on Flow Meter is designed for pipes as large as 8". Installation is easy and requires only a screwdriver. The device can be mounted to a variety of materials including stainless steel, iron, copper, PVC, and resin. Both flow and temperature monitoring is possible for a wide variety of liquids—from water (including pure water) to oil, chemicals, and high-pressure liquids—at temperatures between -4°F and +248°F. The device does not come into contact with the liquid, so there is no risk of liquid-based corrosion or degradation, reducing maintenance time and costs. The rugged metal construction includes an easy-to-read indicator light, and data can be recorded directly on the device. The IP69K enclosure rating and NEMA4X compliance make this sensor both highly reliable and convenient for indoor and outdoor use.

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Process Controls / Process Sensors