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. 339-768
BrandRS PRO
SGD11.18
Each
units
Magnetic Proximity Switch Rectangular - 38mm 10mm 25mm 38 x 25 x 10 mm
RS Stock No. 361-7011
BrandRS PRO
SGD5.97
Each
units
Proximity Switch Cylindrical 11 mm 28mm - - 11 x 28 mm
RS Stock No. 536-1748
BrandRS PRO
SGD4.11
Each
units
Transducer Rectangular - 28.6mm 19mm 6.3mm 28.6 x 6.3 x 19 mm
RS Stock No. 361-4927
BrandRS PRO
SGD5.08
Each
units
Proximity Switch Rectangular - 32mm 8mm 15mm 32 x 8 x 15 mm
RS Stock No. 811-0745
BrandRS PRO
SGD5.72
Each
units
Linear Actuator Rectangular - 32mm 13mm 8mm 32 x 13 x 8 mm
RS Stock No. 536-1710
BrandRS PRO
SGD2.05
Each
units
Transducer Cylindrical 4 mm 19mm - - 4 x 19 mm
RS Stock No. 285-245
BrandRS PRO
SGD8.93
Each
units
Proximity Switch Rectangular - 32mm 24mm 10mm 32 x 24 x 10 mm
RS Stock No. 536-1732
BrandRS PRO
SGD3.08
Each
units
Transducer Rectangular - 20mm - - -
RS Stock No. 765-9331
Mfr. Part No.MP201901
BrandZF
SGD6.51
Each
units
Magnetic Proximity Sensor Rectangular - 28.58mm 19.1mm 6.35mm 28.58 x 19.1 x 6.35 mm
RS Stock No. 289-7812
Mfr. Part No.PSM BLK
BrandAssemtech
SGD4.93
Each
units
Proximity Switch Rectangular - 30mm 7mm 20mm 30 x 7 x 20 mm
RS Stock No. 124-3805
BrandBALLUFF
SGD36.22
Each
units
Micropulse Transducer Round 32 mm - - 8mm 32 (Dia.) x 8 mm
RS Stock No. 765-9343
Mfr. Part No.AS201901
BrandZF
SGD6.43
Each
units
Magnetic Reed Sensor Rectangular - - - - -
RS Stock No. 290-0621
Mfr. Part No.MAG-3015-B
BrandSick
SGD20.92
Each
units
Magnetic Proximity Sensor Cylindrical 31 mm 15mm - - 31 x 15 mm
RS Stock No. 355-5519
Mfr. Part No.BTL5-F-2814-1S
BrandBALLUFF
SGD62.12
Each
units
Micropulse Transducer Rectangular - 28mm 40mm 29.9mm 28 x 40 x 29.9 mm
RS Stock No. 917-2668
Mfr. Part No.PLC10040
BrandCelduc
SGD22.43
Each
units
Magnetic Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 15 x 6.8 mm
RS Stock No. 822-4689
Mfr. Part No.GLS-M1
BrandOmron
SGD19.43
Each
units
Proximity Sensor Rectangular - 50mm 10mm 14mm 50 x 10 x 14 mm
RS Stock No. 181-2185
Mfr. Part No.101MG7
BrandHoneywell
SGD20.48
Each
units
Solid State Sensor Cylindrical 6 mm 6.3mm - - 6.3 x 6.3 mm
RS Stock No. 765-9340
Mfr. Part No.AS201801
BrandZF
SGD4.56
Each
units
Magnetic Reed Sensor Rectangular - - - - -
RS Stock No. 917-2684
Mfr. Part No.PWB11500
BrandCelduc
SGD18.57
Each
units
Magnetic Proximity Sensor Rectangular - 47.7mm 9.7mm 14mm 47.7 x 14 x 9.7 mm
RS Stock No. 784-0029
Mfr. Part No.DM25-32-07
SGD27.00
Each
units
Magnetic Sensor Round 32 mm - - 7mm 32 (Dia.) x 7 mm