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  • Flow sensor

A single unit offers two functions: flow switch, flow sight!

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Features

  • You can use the flow sensor with an input power supply of from 12 to 24 VDC (permissible voltage fluctuation ±10%).
  • The amplifier protection structure conforms to IP67.
  • You can set the lower limit of the flowrate. If the flowrate falls below this limit, the red LED lamp (NG) turns on, and contact signal output is given to notify the operator of the critical situation.
  • Analog output (4 to 20 mA) proportional to the flowrate is issued.
  • In the case of low pressure specifications, you can check the flow of fluid by observing the rotor rotation.
  • In the case of high pressure specifications, you can measure the flowrate at 25MPa.（except FS-1）For FS-2, 3 and 6, 8 excluding , be sure to use it with the cap B (for high pressure) mounted in position. (Cap B (for high pressure) is mounted when shipped from the factory).
  • You can use the sensor at the desired installation position (horizontal, vertical or tilted position) in the desired inflow direction.
  • Remove the cap from the front of the main body, and to clean the rotor by air.

Type

FSL - 6 - O
num num num
num Model Flow sensor
num Screw diameter
(for both ends)		 1 : Rc1/8
2 : Rc1/4
3 : Rc3/8
6 : Rc3/4
8 : Rc1
num Applicable fluid O : oil (For FS-1, O type only is available)
W : water･coolant (water solubility)

Example of use

  • Seizure can be avoided by flow control of lubricating oil for the spindles and bearings of machine tools, printing machines, presses and speed reducers.
  • Tool damage and fire can be prevented by control of coolant flow to machine tools.
  • This is used to check if the filter is clogged or not.
  • Coolant flow control.

Specification

☻ Body and overall Specifications
Type FS-1 FS-2 FS-3 FS-6 FS-8
Connection diameter Rc1/8 Rc1/4 Rc3/8 Rc3/4 Rc1
Maximum flow 1 ℓ/min 10 ℓ/min 20 ℓ/min 50 ℓ/min 100 ℓ/min
Flow rate range 0.2∼1 ℓ/min O：1∼10 ℓ/min
W：1∼7 ℓ/min		 2∼20 ℓ/min 5∼50 ℓ/min 10∼100 ℓ/min
Maximum service pressure 3MPa 3MPa
25MPa
Visual check window have have
non ※1
Output flow 0.2∼1 ℓ/min O：1∼10 ℓ/min
W：1∼7 ℓ/min		 2∼20 ℓ/min 5∼50 ℓ/min 10∼100 ℓ/min
Accuracy
(full flow rate range)		 ±0.1 ℓ/min ±0.5 ℓ/min ±1 ℓ/min ±2.5 ℓ/min ±5 ℓ/min
Fluid ※2 Lubricant Lubricant, fresh water, coolant
Pressure loss ※3 0.03MPa or less
(at 32cst)		 0.025MPa or less (at 32cst)
Temperature range 0～80℃ (ambient temperature 0 to 50 deg. C)
Main unit material C3604(Ni plated), Nd-Fe-B, POM, PC, NBR　(FSL-1 C3604→SUS304)

☻ Amplifier design
Type FS-1 FS-2 FS-3 FS-6 FS-8
Power source 12 to 24 VDC (admissible voltage variation +/-10%)
Maximum current
consumption		 max 100mA
Output PNP Open collector.　Maximum load current 100mA
Connection M12X1-4P Connectors (DC)
Protective structure IP65 Considerable
Material ABS, PC, NBR
Factory-sealed
screw part way		 Plastic bag Plastic dust cap fitted
Output state ※4 LED turns on and the contact output is (closed) ON.
LED turns on and the contact output is (open) OFF.
Connectors ※5

Principle of actuation


The detection part of flow sensor utilizes rotation of the rotor (turbine) installed in the fluid. The measuring part detects, by means of the external magnetic sensor, the rotation speed of the permanent magnet mounted on the circumference of the rotor. The device is provided with analog and contact outputs, as standard features, proportional to the rotation speed (flow rate).

Accuracy

Hydraulic fluid  32cst/0 specification Fresh water at Normal temperature  ----/W specification

The tests before delivery from our factory are performed in the conditions mentioned above. The accuracy is given in the specification of each flow sensor unit.

Flow Sensor Selection Chart

Caution of use

  • Be sure to use within the maximum service flow rate.
  • DO NOT install the flow sensor near a machine generating magnetic field (motor for example) to avoid erratic function.
  • Provide straight piping more than 10 times the inner diameter of the pipe on the upstream side, and more than 4 times on the downstream side. DO NOT install curved or confluence or branch, that is, elbow or Tee or throttle valve, near the outlet.
    Flow sensor Upstream straight pipe Downstream straight pipe
    FS-1 100mm 40mm
    FS-2 140mm 60mm
    FS-3 170mm 70mm
    FS-6 270mm 110mm
    FS-8 340mm 140mm
  • The rotor incorporates a magnet. For lubricant oil, install a filter of 5 to 20 microns; for coolant, a filter of 20 to 50 microns.

* Please contact a staff member of our sales department, for use for a general purpose NC lathe or grinding machine with coolant containing much cut dust.
* If sticking cut dust prevents the rotor from rotating, remove the front cap and perform air blow to eliminate the cut dust.


Drawing data download

Product nameType No.Download
Oil 0.2～1ℓ/minDFS-1-OPDF
Oil 1～10ℓ/minDFS-2-OPDF
Water and water soluble coolant 1～10ℓ/minDFS-2-WPDF
Oil 2～20ℓ/minDFS-3-OPDF
Water and water soluble coolant 2～20ℓ/minDFS-3-WPDF
Oil 5～50ℓ/minDFS-6-OPDF
Water and water soluble coolant 5～50ℓ/minDFS-6-WPDF
Oil 10〜100ℓ/minDFS-8-OPDF
Water and water soluble coolant 10〜100ℓ/minDFS-8-WPDF

* Please confirm "Terms of Use" about the use of PDF data.


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