Sensor & Switch Magnets

Sensor magnets (also known as reed switches) are electrical switches operated by a magnetic field. They can be used to detect specific actions, like the opening of a door, and are widely used for electrical circuit control.

What are sensor magnets used for?

Sensor magnets can be used in door and window sensors, and are commonly found in burglar alarm systems. They're also widely used for communications. Once the magnet is pulled away from the switch, the reed switch will go back to its original position. A reed relay is when there are one or more reed switches inside a coil.

Why use sensor magnets?

Sensor magnets can be used to reduce current leakage. This is useful for applications in hazardous areas, for example where there's flammable gas in the area, or in medical devices. Sensor magnets are also useful in locations where it isn't possible to make direct contact with the switch, such as in explosive or toxic environments.


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Description Price Application Shape Diameter Length Width Height Dimensions
RS Stock No. 917-2668
Mfr. Part No.PLC10040
BrandCelduc
HK$124.47
Each
units
Magnetic Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 15 x 6.8 mm
RS Stock No. 917-2678
Mfr. Part No.PTI70020
BrandCelduc
HK$214.63
Each
units
Magnetic Proximity Sensor Cylindrical M8 32mm - - -
RS Stock No. 917-2640
Mfr. Part No.PCC26720
BrandCelduc
HK$112.11
Each
units
Magnetic Proximity Sensor Cylindrical M12 80mm - - -
RS Stock No. 917-2646
Mfr. Part No.PCA22330
BrandCelduc
HK$109.75
Each
units
Magnetic Proximity Sensor Cylindrical M12 80mm - - -
RS Stock No. 917-2665
Mfr. Part No.PLMA0100
BrandCelduc
HK$243.14
Each
units
Magnetic Proximity Sensor Rectangular - 88mm 12mm 38mm 88 x 38 x 12 mm
RS Stock No. 179-2889
Mfr. Part No.P3150000
BrandCelduc
HK$65.93
Each
units
Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 6.8 x 15 mm
RS Stock No. 179-2895
Mfr. Part No.P6250000
BrandCelduc
HK$56.56
Each
units
Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 6.8 x 15 mm
RS Stock No. 499-0935
Mfr. Part No.PT810000
BrandCelduc
HK$66.04
Each
units
Aimant Cylindrical 11 mm 33mm - - 10.7 x 33 mm
RS Stock No. 917-2674
Mfr. Part No.PTI50020
BrandCelduc
HK$129.18
Each
units
Magnetic Proximity Sensor Cylindrical M8 25mm - - -
RS Stock No. 917-2671
Mfr. Part No.PTI40020
BrandCelduc
HK$89.03
Each
units
Magnetic Proximity Sensor Cylindrical M8 25mm - - -
RS Stock No. 917-2684
Mfr. Part No.PWB11500
BrandCelduc
HK$105.24
Each
units
Magnetic Proximity Sensor Rectangular - 47.7mm 9.7mm 14mm 47.7 x 14 x 9.7 mm
RS Stock No. 917-2662
Mfr. Part No.PTA80020
BrandCelduc
HK$148.63
Each
units
Magnetic Proximity Sensor Cylindrical M10 40mm - - -