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
TWD567.00
Each
units
Proximity Sensor Rectangular - 50mm 10mm 14mm 50 x 10 x 14 mm
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. 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
BrandZF
TWD451.00
Each
units
Magnetic Proximity Sensor Cylindrical - 25.4mm - - -
RS Stock No. 331-8174
Mfr. Part No.RSH32
BrandAssemtech
TWD58.00
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 27.94mm 4.75mm 4.75mm 27.94 x 4.75 x 4.75 mm
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
New
RS Stock No. 200-9221
Mfr. Part No.XXA30B1PM12
TWD8,859.00
Each
units
- - - - - - -
New
RS Stock No. 200-9260
Mfr. Part No.XXS30S1AM12
TWD10,091.00
Each
units
- - - - - - -
RS Stock No. 355-5531
Mfr. Part No.BTL5-P-3800-2
BrandBALLUFF
TWD844.00
Each
units
Micropulse Transducer Rectangular - 38mm 20mm 14mm 38 x 20 x 14 mm
RS Stock No. 179-2889
Mfr. Part No.P3150000
BrandCelduc
TWD200.00
Each
units
Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 6.8 x 15 mm
RS Stock No. 917-2671
Mfr. Part No.PTI40020
BrandCelduc
TWD363.00
Each
units
Magnetic Proximity Sensor Cylindrical M8 25mm - - -
RS Stock No. 917-2662
Mfr. Part No.PTA80020
BrandCelduc
TWD599.00
Each
units
Magnetic Proximity Sensor Cylindrical M10 40mm - - -
RS Stock No. 466-1479
Mfr. Part No.T-62 N/S
TWD215.00
Each
units
Electronic Magnetic Sensor Cylindrical 23 mm 10mm - - 23 x 10 mm
New
RS Stock No. 200-9222
Mfr. Part No.XXA30B1VM12
TWD9,906.00
Each
units
- - - - - - -
New
RS Stock No. 200-9261
Mfr. Part No.XXS30S1PM12
TWD9,025.00
Each
units
- - - - - - -
RS Stock No. 866-2583
Mfr. Part No.M1219-1
BrandAssemtech
TWD46.00
Each
units
- Cylindrical 3 mm - - 1mm 3 (Dia.) x 1 mm
New
RS Stock No. 200-9254
Mfr. Part No.XXS30P2AM12
TWD9,271.00
Each
units
- - - - - - -
New
RS Stock No. 200-9228
Mfr. Part No.XXA30P1PM12
TWD7,651.00
Each
units
- - - - - - -
RS Stock No. 765-9353
Mfr. Part No.CU103602
BrandZF
TWD1,172.00
Each
units
Angular Position Sensor - - 57.33mm 48.3mm 17.7mm 57.33 x 48.3 x 17.7 mm