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Magnets |

A sensor magnet in housing is a permanent magnet that is epoxy encapsulated in a plastic or metal housing that is either cylindrical panel mount or adjustable screw mount, rectangular screw mount, or other custom mounted housing.  Our sensor magnet products are used to actuate various magnetic reed sensors, hall effect sensor, and magnetic reed switches. The magnet is typically mounted to the moving part while the sensor or switch is mounted to a fixed surface.

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M02 Actuator Magnet in Housing

The M02 series sensor magnet in housing has a convenient screw mount. Pair this magnet with our MK02 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M03 Actuator Magnet in Housing

The M03 series sensor magnet in housing comes in a cylindrical housing. Pair this magnet with our MK03 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M04 Actuator Magnet in Housing

The M04 series sensor magnet in housing has adjustable slotted screw mount holes. Pair this magnet with our MK04 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M05 Actuator Magnet in Housing

The M05 series sensor magnet in housing has a single screw mount slot for adjustment. Pair this magnet with our MK05 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M06 Actuator Magnet in Housing

The M06 series sensor magnet in housing comes in 3 different surface mount (SMD) sizes. Pair this magnet with our MK06 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M11/M5, M11/S8 Actuator Magnet in Housing

The M11/M5, M11/S8 series sensor magnet in housing is sealed in a convenient, easy adjustable threaded stainless steel housing. Pair this magnet with our MK11/M5 or MK11/S8 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M11/M8 Actuator Magnet in Housing

The M11/M8 series sensor magnet in housing is sealed in a convenient, easy adjustable threaded plastic housing. Pair this magnet with our MK11/M8 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M11/B6, B8, B10, B12 Actuator Magnet in Housing

The M11/B6, B8, B10, B12 series sensor magnet in housing is sealed in a convenient, easy adjustable threaded brass housing. Pair this magnet with our MK11/B (M6, M8, M10 or M12) series reed sensor (sold separate) for a proximity sensing solution. The brass housing is structurally robust enabling it to withstand higher torque settings, and resist high temperatures, moisture, and compression. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M13 Actuator Magnet in Housing

The M13 series sensor magnet in housing has slotted holes for adjustable screw mounting. Pair this magnet with our MK13 series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

M21P/1, M21P/2 Actuator Magnet in Housing

The M21P/1, M21P/2 series sensor magnet in housing has either horizontal (/1) or vertical (/2) slotted screw mount holes. Pair this magnet with our MK21P/MK21M series reed sensor (sold separate) for a proximity sensing solution. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.

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Permanent Magnets

 

Permanent Magnets

Permanent magnets have a consistent non-varying magnetic field that has a north and south pole associated with them.  The magnets come in different materials – rare earth, Alnico and hard ferrite.  They all come in different sizes and shapes and have different magnetic strengths. The rare earth are the strongest, Alnico are the most stable, and ferrite are the least expensive. The magnetic strength is generally measured in gauss or milliTesla.

A Reed Switch requires either a permanent magnet or magnetic field in order to activate the switch, thus it is commonly called a magnetic reed switch. Magnets have reversible and irreversible demagnetization specifications. Engineers should consider shock, vibration, strong external magnetic fields as well as high temperatures in their designs. All these factors influence the magnetic force and the long term stability in different ways.

Preferably the magnet is mounted on the moving part of the application. Professional tuning of magnet and reed switch pairing can improve the functionality of the whole sensor-magnet system.

Types of Magnets

We offer the following types of permanent magnets:

  • AlNiCo (Aluminum Nickel, Cobalt, Iron and Titanium)
  • SmCo (Samarium–Cobalt) & NdFeB (Neodymium) - rare earth
  • Hf - hard ferrite

These are some of our most widely used models, others available as required.

  • AlNiCo - Ø2.5 x 12.7 mm, Ø3.0 x 12.0 mm, Ø4.0 x 19.0 mm, Ø5.0 x 4.0 mm, Ø5.0 x 20.0 mm, Ø5.5 x 22.0 mm, Ø7.5 x 27.0 mm, 3.2 x 3.2 x 19.0 mm
  • Rare Earth - NdFeB N35 Ø4 x 19 mm, NdFeB N35H Ø4 x 19 mm, NdFeB N45 Ø4 x 19 mm, NdFeB 250/175H Ø6 x 10 mm, NdFeB 250/175H 10 x 5 x 1.9 mm, SmCo5 Ø1.9 x 3 mm, SmCo5 Ø3 x 4 mm
  • Hard Ferrite - 28/26 2.6 x 2.6 x 4.0 mm, 28/26 3.5 x 1.8 x 1.8 mm, 28/26 6.7 x 6.7 x 2.7 mm

Magnets have reversible and irreversible demagnetization specifications. Be especially careful with shock, vibration, strong and close external magnetic fields as well as high temperatures. All these factors influence the magnetic force and the long term stability in different intensities. Preferably the magnet is mounted on the moving part of the application. Professional tuning of magnet and reed switch can improve the functionality of the whole sensor-magnet system.

low-to-high
CostsFerriteAiNiCoNdFeBSmCo
Energy (WxHmax.)FerriteAiNiCoSmCoNdFeB
Working TemperatureNdFeBFerriteSmCoAiNiCo
Corrosion - ResistantNdFeBSmCoAiNiCoFerrite
Opposing Field - RessistantAiNiCoFerriteNdFeBSmCo
Mecanical StrengthFerriteSmCoNdFeBAiNiCo
Temperature CoefficientAiNiCoSmCoNdFeBFerrite

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