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. 811-0745
BrandRS PRO
TWD129.00
Each
units
Linear Actuator Rectangular - 32mm 13mm 8mm 32 x 13 x 8 mm
RS Stock No. 822-4689
Mfr. Part No.GLS-M1
BrandOmron
TWD427.00
Each
units
Proximity Sensor Rectangular - 50mm 10mm 14mm 50 x 10 x 14 mm
RS Stock No. 536-1748
BrandRS PRO
TWD93.00
Each
units
Transducer Rectangular - 28.6mm 19mm 6.3mm 28.6 x 6.3 x 19 mm
RS Stock No. 765-9334
Mfr. Part No.MP200702
BrandCherry
TWD484.00
Each
units
Magnetic Proximity Sensor Cylindrical - 25.4mm - - -
RS Stock No. 361-5009
Mfr. Part No.S1443
BrandAssemtech
TWD122.00
Each
units
Hall Effect Switch Rectangular - 30mm 7mm 20mm 30 x 7 x 20 mm
RS Stock No. 765-9362
Mfr. Part No.CU103601
BrandZF
TWD1,457.00
Each
units
Angular Position Sensor - - 57.33mm 48.3mm 17.7mm 57.33 x 48.3 x 17.7 mm
RS Stock No. 355-5519
Mfr. Part No.BTL5-F-2814-1S
BrandBALLUFF
TWD1,360.00
Each
units
Micropulse Transducer Rectangular - 28mm 40mm 29.9mm 28 x 40 x 29.9 mm
RS Stock No. 331-7604
Mfr. Part No.S1416
BrandAssemtech
TWD985.00
Each
units
Reed Switch Cylindrical - 50mm - - -
RS Stock No. 917-2678
Mfr. Part No.PTI70020
BrandCelduc
TWD862.00
Each
units
Magnetic Proximity Sensor Cylindrical M8 32mm - - -
RS Stock No. 361-7011
BrandRS PRO
TWD83.00
Each
units
Proximity Switch Cylindrical 11 mm 28mm - - 11 x 28 mm
RS Stock No. 499-0935
Mfr. Part No.PT810000
BrandCelduc
TWD282.00
Each
units
Aimant Cylindrical 11 mm 33mm - - 10.7 x 33 mm
RS Stock No. 124-3806
BrandBALLUFF
TWD938.00
Each
units
Micropulse Transducer Round 25 mm - - 8mm 25 (Dia.) x 8 mm
RS Stock No. 536-1732
BrandRS PRO
TWD69.00
Each
units
Transducer Rectangular - 20mm - - -
RS Stock No. 784-0029
Mfr. Part No.DM25-32-07
TWD675.00
Each
units
Magnetic Sensor Round 32 mm - - 7mm 32 (Dia.) x 7 mm
RS Stock No. 917-2668
Mfr. Part No.PLC10040
BrandCelduc
TWD517.00
Each
units
Magnetic Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 15 x 6.8 mm
RS Stock No. 331-8613
Mfr. Part No.RSH33
BrandAssemtech
TWD35.00
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 19.05mm 3mm 3mm 19.05 x 3 x 3 mm
RS Stock No. 917-2640
Mfr. Part No.PCC26720
BrandCelduc
TWD493.00
Each
units
Magnetic Proximity Sensor Cylindrical M12 80mm - - -
RS Stock No. 765-9347
Mfr. Part No.MP200701
BrandZF
TWD335.00
Each
units
Magnetic Proximity Sensor Cylindrical - 25.4mm - - -
RS Stock No. 917-2662
Mfr. Part No.PTA80020
BrandCelduc
TWD596.00
Each
units
Magnetic Proximity Sensor Cylindrical M10 40mm - - -
RS Stock No. 124-3807
BrandBALLUFF
TWD1,478.00
Each
units
Micropulse Transducer Rectangular - 55mm 20mm 21mm 55 x 20 x 21 mm