Level Transmitter・Level Switch <Liquid>
Displacer Float Switch

Displacer Float Switch (MFLD series) is level switches that detect liquid level in tanks and containers.

Material is SUS304 or SUS316 and can be used in corrosive environments.


  1. Can be used with liquids with a specific gravity of 0.8 to 1.2.
  2. Float position can be set freely.
  3. It can detect up to about 9m.



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Features of Displacer Float Switch

Resistant to adhesion

If there is no adhesion that exceeds weight of float, there will be no effect on operation.

Easy to set up

Works anywhere on wire.

You can freely change float position with just one screwdriver.

Resistant to waves
and currents

A self-holding circuit is added to contact and a balance weight is attached to lower end of the wire, so it is almost unaffected by ripples or currents on liquid surface.

Operating principle

A float integrated with wire moves up and down due to buoyancy as liquid level changes. A magnet at top of wire opens and closes a reed switch built into bottom of terminal box to detect water level.

How to use?


Please install it away from strong magnetic fields such as motors, transformers, solenoid valves, etc.

2. Mounting

Avoid using product in areas with strong currents, such as inlet, outlet, locations that come into direct contact with water, and locations with agitators.

3. Wiring

Contact reed switches are voltage-free contacts and cannot be repaired if damaged.

Before turning on power, be sure to check that there are no short circuits, overloads, or incorrect wiring.

4. Float position

Operating position is 20mm from top surface of float. Loosen fixing screw with a screwdriver, move it to desired position, then tighten screw again and secure with nut.

Tighten screws to a torque of 0.35 to 0.4Nm. 

Wire digs into groove, making it difficult to fall.

*Please see the instruction manual for details.

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Model lineup


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