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          Clamp-on Flow MeterFD-R series


          Sensor Main Unit 65A/80A Type


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          Supported pipe diameter

          2 1/2" (65 A), ø 64 to ø 83
          3" (80 A), ø 83 to ø 100

          Supported pipe materials


          Supported fluids

          Various liquids (i.e. water, oils, chemicals)*1

          Supported fluid temperature

          -20 to +120 °C (no freezing on the pipe surface)*2

          Maximum rated flow

          Rated flow velocity range: 5.0 m/s
          Flow rate range (Typical):
          2 1/2" (65 A) : 1000 L/min 60 m3/h
          3" (80 A) : 1500 L/min 90 m3/h

          Zero cut flow rate

          Zero cut: 0.3 m/s (default)*3
          Flow rate (Typical): 90 L/min 5.4 m3/h

          Display method

          Dual row, 5-digit display with white, 14-segment LED; Large status indicator; Output indicators; Stability indicator; Unit indicator

          Display update cycle

          Approx. 3 Hz

          Display resolution

          1 (L/min)

          Response time

          0.5 s/1.0 s/2.5 s/5.0 s/10.0 s/30.0 s/60.0 s/120.0 s/200.0 s (variable)

          Measurement accuracy

          Between 20 and 100 % of F.S.: ±2.0 % of RD*4*5
          Between 6 and 20 % of F.S.: ±0.4 % of F.S.*4*5

          Zero point error

          ±0.5 % of F.S.*4*6



          Flow units

          L/min, m3/h

          Integrated flow unit display

          1/10/100/1000/10000 (L)

          Pipe temperature measurement accuracy

          ±3 °C (liquid temperature of -20 to + 50 °C)
          ±5 °C (liquid temperature of 50 to +120 °C)
          (ambient operating temperature of 25 °C)*4

          Wiring specifications

          Power supply

          DC power supply: M12, 4-pin connector/AC power supply: M4 screw terminal block (selectable)


          When using a DC power supply: M12, 4-pin connector/when using an AC power supply: M3 screw terminal block

          Input/Output (Selectable)

          Output (ch.1/ch.2)

          Control output/Integrated pulse output/Error output/Temperature alarm, NPN/PNP setting switchable, open collector output 30 VDC or less, max. 100 mA/ch., residual voltage: 2.5 V or less*7

          Analogue output (ch.1/ch.2)

          Flow rate analogue output/Temperature analogue output and 4-20 mA/0-20 mA (selectable), load resistance: 500 Ω or less*7

          External input (ch.2)

          Integrated flow reset input/Flow rate zero input/Origin adjustment input (selectable), short-circuit current: 1.5 mA or less, input time: 20 ms or more*7

          Protection circuit

          Power supply reverse connection protection, Power supply surge protection, Short-circuit protection for each output, Surge protection for each output


          Power voltage

          20 to 30 VDC including 10 % ripple (P-P), Class 2/100 to 240 VAC -15 % or +10 % (50/60 Hz)

          Current consumption

          When using a DC power supply: 200 mA or less (load current excluded), 400 mA or less (load current included)
          When using an AC power supply: 15 VA or less

          Environmental resistance

          Enclosure rating

          IP65/67 (IEC60529), IP69K (ISO20653), Enclosure Type 4X (NEMA250)

          Ambient temperature

          -20 to +60 °C (no freezing)*2

          Relative humidity

          5 to 90 % RH (no condensation)

          Vibration resistance

          10 to 55 Hz, compound amplitude 1.5 mm, XYZ axes 2 hours for each axis

          Shock resistance

          100 m/s2, 16 ms pulse, XYZ axes, 1000 times for each axis


          Main unit size: 218.5 mm x 66.9 mm x 70.7 mm


          Main unit

          Body: aluminium die-casting + coating/PPS, display: reinforced glass, connectors: SUS304-equivalent

          Unit rear


          Upper/lower bracket



          Main unit: Approx. 1.0 kg
          Upper/lower bracket: Approx. 2.0 kg (including sub unit)

          *1 Liquid must allow for the passage of an ultrasonic pulse, as well as not contain large air pockets or excessive bubbles. Detection may be unstable due to the type and status of the pipes.
          *2 Perform derating depending on the ambient temperature and liquid temperature when using an AC power supply.
          *3 The zero cut flow rate can be changed in the settings.
          *4 This value is guaranteed by KEYENCE inspection facilities. Errors will be introduced by the type and status of the pipes, the type and temperature of the fluid, and the zero cut flow rate.
          *5 This is the value when considering linearity + span error + repeatability in a stable environment of 25 °C.
          *6 It is possible to enhance the precision of zero point error by performing an origin adjustment.
          *7 IO-Link: Compatible with Specification v 1.1/COM 2 (38.4 kbps) The setting file can be downloaded from the KEYENCE website. If using the unit in an environment where downloading the file is not accessible via Internet, contact your nearest KEYENCE office. IO-Link is either a registered trademark or trademark of PROFIBUS Nutzerorganisation e.V. (PNO).

          Process Controls / Process Sensors