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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Viewing 1 - 20 of 57 products
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Description Price Application Shape Diameter Length Width Height Dimensions
RS Stock No. 339-768
BrandRS PRO
HK$44.21
Each
units
Magnetic Proximity Switch Rectangular - 38mm 10mm 25mm 38 x 25 x 10 mm
RS Stock No. 289-7812
Mfr. Part No.PSM BLK
BrandAssemtech
HK$24.94
Each
units
Proximity Switch Rectangular - 30mm 7mm 20mm 30 x 7 x 20 mm
RS Stock No. 613-8202
Mfr. Part No.MMPSM
BrandAssemtech
HK$22.59
Each
units
Door Switch, Linear Actuator, Security System Switch Rectangular - 20mm 6mm 14mm 20 x 6 x 14 mm
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. 765-9337
Mfr. Part No.MP201801
BrandZF
HK$36.11
Each
units
Magnetic Proximity Sensor Rectangular - 23.01mm 13.97mm 5.99mm 23.01 x 13.97 x 5.99 mm
RS Stock No. 361-7011
BrandRS PRO
HK$33.30
Each
units
Proximity Switch Cylindrical 11 mm 28mm - - 11 x 28 mm
RS Stock No. 822-4689
Mfr. Part No.GLS-M1
BrandOmron
HK$103.37
Each
units
Proximity Sensor Rectangular - 50mm 10mm 14mm 50 x 10 x 14 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. 331-8613
Mfr. Part No.RSH33
BrandAssemtech
HK$6.40
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 19.05mm 3mm 3mm 19.05 x 3 x 3 mm
RS Stock No. 361-5021
Mfr. Part No.S1467
BrandAssemtech
HK$158.95
Each
units
Hall Effect Switch Cylindrical - 45mm - - -
RS Stock No. 917-2646
Mfr. Part No.PCA22330
BrandCelduc
HK$109.75
Each
units
Magnetic Proximity Sensor Cylindrical M12 80mm - - -
RS Stock No. 289-7856
Mfr. Part No.PRM
BrandAssemtech
HK$8.95
Each
units
Reed Switch Cylindrical 6 mm 18mm - - 6 x 18 mm
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. 355-5519
Mfr. Part No.BTL5-F-2814-1S
BrandBALLUFF
HK$373.13
Each
units
Micropulse Transducer Rectangular - 28mm 40mm 29.9mm 28 x 40 x 29.9 mm
RS Stock No. 536-1710
BrandRS PRO
HK$9.31
Each
units
Transducer Cylindrical 4 mm 19mm - - 4 x 19 mm
RS Stock No. 765-9343
Mfr. Part No.AS201901
BrandZF
HK$30.32
Each
units
Magnetic Reed Sensor Rectangular - - - - -
RS Stock No. 765-9347
Mfr. Part No.MP200701
BrandZF
HK$64.15
Each
units
Magnetic Proximity Sensor Cylindrical - 25.4mm - - -
RS Stock No. 765-9334
Mfr. Part No.MP200702
BrandCherry
HK$79.43
Each
units
Magnetic Proximity Sensor Cylindrical - 25.4mm - - -
RS Stock No. 361-4927
BrandRS PRO
HK$23.03
Each
units
Proximity Switch Rectangular - 32mm 8mm 15mm 32 x 8 x 15 mm
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