Simple model for vertical mounting. Thread process connection to mount the device from the inside of the tank and with cable output.

These devices are used to control the level in tanks, containers, bypass pipes, ... of liquids like waters, oils, chemical products, ... with non-ferric particles in suspension are used.

The magnetic float switches are indicators that are made under request depending on each application. The material of the indicator body, float, length of the switch, process connection (thread, flange, clamp flange), electrical output (cable output, DIN connector, connection box), number of contacts (1 to 4 depending on the model), type of contacts (NO, NC, SPDT - NO+NC) and position of the contacts.

Models in Stainless Steel 1.4401: models with Ø 12 mm body, with espherical Ø 52 mm and maximum lenght up to 2.500 mm. There are other float models depending on the application (Ø 44 mm, Ø 95 mm with roominess or Polyamide Ø 29x50 to use normally in oils). There is range of models to reduced applications with Ø 8 mm body, Ø 30x30 mm float and with a maximum length up to 500 mm.

Also, there are models with PVC or Polypropylene housing with a Polypropylene Ø 29x50 mm float or PVDF housing with PVDF Ø38x60 mm float.

To use these devices in ambients with vapour, the contacts can be protected with condensation protection gel (removal contacts in the future) or with Epoxy resin (non-removable contacts in the future) that can extend the lifetime of the device.

The magnetic float switches have a guide-way body where a float moves. Inside the body there are REED contacts that change its position due to the magnetic field of the magnet placed inside the float when arrives at the contact point. When the liquid level falls, the float moves back and the signal turns into the initial position.

The standard form is mounting the device with the thread proccess connection. Drill a hole in the top of the tank or container, polish it to prevent damage and introduce the cable from inside and place the group to the wall verifying the position of the device. Keep the position of the group and tigthen the nut, verify the position of the indicator and connect the cable to the system of control.

Depending on the application, the indicator can be mounted from the bottom of the tank or container (facing down).

For a correct use of the level switch, the float must not touch the walls of the tank and it is necessary to ensure the free movement of the float.


Approximate measures given in mm.

Technical data

NameMagnetic float switch
TypeBC... – ref: 2510..
Body lengthUnder request, depending on the model
Body diamterStandard Ø 12 mm. Ø 8 mm models with float S.S. Ø 30x30 mm
Number of contacts1 – 4 depending on the model
ContactsNO, NC or SPDT (NO + NC)
Position of the contactsUnder request, depending on the model
Capacity of the contact50 W, 0.5 A, 230 V AC depending on the model (for resistive loads)
For inductive or capacitive loads reduce at 50%
Electrical outputCable. Standard 1 meter, other lengths under request
Thread Proccess connectionG 3/8”, bajo demanda otras medidas
FloatStandard Ø 52 mm
(Under request Ø 30x30 mm, Ø 44x60 mm, Ø 95 mm with roominess or Polyamide Ø 29x50 mm for fuel or oils)
Product density0.70 Kg/l depending on the model
ProtectionIP65 according DIN EN60529
(Condensation protection gel or Epoxy resin protection of the contacts under request)
Maximum pressure+30 bar depending on the model
Maximum temperatureStandard +90º C depending on the model
(Under request +120º C with Silicone cable)
BodyStandard Stainless Steel 1.4401
(Under request PVC, Polypropylene or PVDF)
FloatStandard Stainless Steel 1.4401 (Under request PVC, Polypropylene, Polyamide or PVDF)
Mechanical stopsStandard Stainless Steel 1.4401
(Under request PVC, Polypropylene or PVDF)
CableStandard double insulation PVC
(Under request Silicone)

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