Clamp-on Micro Flow Sensor

FD-X series

Catalogs View Catalog

Sensor head Rated flow range 20 L/min FD-XS20E

FD-XS20E - Sensor head Rated flow range 20 L/min

  • CE Marking
  • CSA




Supported pipe materials

Metal pipes, Plastic pipes (soft/hard) *1

Supported fluids

Liquids (water, oil, adhesive, grease, chemical solutions, etc.) *1

Supported fluid temperature

0 °C (no freezing on the pipe surface) to 100 °C 32 to 212 °F (Pipe surface temperature)

Clamp set model

Plastic pipe/tube attachment

FD-XC20R1, FD-XC20R2, FD-XC20R3, FD-XC20R4

Metal pipe attachment

FD-XC20M1, FD-XC20M2*2

Maximum rated flow rate

Outer diameter of pipe 3/8 " (9.53 mm) , ø 10 0.39 ", ø 10.5 0.41 ": 15.00 L/min
Outer diameter of pipe ø 12 0.47 ", 1/2 " (12.7 mm) , ø 13.8 0.54 ": 20.00 L/min

Zero cut flow rate

0.15 L/min*3 (variable, default)

Display resolution

Instantaneous flow rate

0.01/0.1 L/min (Displayed on controller)


Response time 50 ms: ±20 % of RD
Response time 500 ms: ±15 % of RD



Display method

Status indicator

Environmental resistance

Enclosure rating

IP65/IP67 (IEC60529) , IP68G (JIS C0920) *4

Ambient temperature

-10 to 60 °C 14 to 140 °F (No freezing)

Relative humidity

35 % to 85 %RH (No condensation)

Vibration resistance

10 to 55 Hz, double amplitude 1.5 mm 0.06 ", 2 hours each for X,Y,Z direction

Shock resistance

50 G 11 ms 3 times each for X,Y,Z direction


Sensor head

Head body: PPS/PPSU, relay amplifier: PPS, cable: PVC, controller connector: PPS/PBT/POM

Clamp set

For plastic pipe

Body, fixing screw: PPS, detection surface: special rubber, pipe support rubber: FKM, sensor head fixing screw: SUSXM7

For metal pipe

Metal: SUS304/SUSXM7, detection surface: special rubber, clamp support rubber: FKM, sensor head fixing screw: SUSXM7


Approx. 260 g

*1 Liquid must allow for the passage of an ultrasonic pulse, as well as not contain large air pockets or excessive bubbles. Readings may become unstable depending on the type of pipe.
*2 When using stainless steel or iron pipes, the ideal pipe wall thickness is as follows, FD-XS1E: approx. 0.5 mm 0.02", FD-XS8E: approx. 1 mm 0.04", FD-XS20E: approx. 1 0.04" to 2 mm 0.08". FD-X signal strength and stability will decrease as the thickness of the pipe wall increases or decreases from the suggested size.
*3 The zero cut flow rate can be changed in the settings. When using the unit with a low flow rate range, perform an origin adjustment when the fluid is not moving if you change the zero cut flow rate.
*4 The connector part of the sensor head cable is IP65/IP67.

Other Models