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 21 - 40 of 57 products
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Description Price Application Shape Diameter Length Width Height Dimensions
RS Stock No. 917-2668
Mfr. Part No.PLC10040
BrandCelduc
$28.71
Each
units
Magnetic Proximity Sensor Rectangular - 32mm 6.8mm 15mm 32 x 15 x 6.8 mm
RS Stock No. 355-5519
Mfr. Part No.BTL5-F-2814-1S
BrandBALLUFF
$76.23
Each
units
Micropulse Transducer Rectangular - 28mm 40mm 29.9mm 28 x 40 x 29.9 mm
RS Stock No. 289-7856
Mfr. Part No.PRM
BrandAssemtech
$2.23
Each
units
Reed Switch Cylindrical 6 mm 18mm - - 6 x 18 mm
RS Stock No. 124-3806
BrandBALLUFF
$36.98
Each
units
Micropulse Transducer Round 25 mm - - 8mm 25 (Dia.) x 8 mm
RS Stock No. 765-9334
Mfr. Part No.MP200702
BrandCherry
$23.86
Each
units
Magnetic Proximity Sensor Cylindrical - 25.4mm - - -
RS Stock No. 331-8613
Mfr. Part No.RSH33
BrandAssemtech
$0.99
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 19.05mm 3mm 3mm 19.05 x 3 x 3 mm
New
RS Stock No. 183-7483
Mfr. Part No.Z4DC01
BrandOmron
$120.434
Each (In a Pack of 50)
units
Detect Duplicated Paper Feeding - - 35.5mm 15mm 16mm 35.5 x 15 x 16 mm
RS Stock No. 331-7604
Mfr. Part No.S1416
BrandAssemtech
$37.70
Each
units
Reed Switch Cylindrical - 50mm - - -
RS Stock No. 765-9362
Mfr. Part No.CU103601
BrandZF
$83.72
Each
units
Angular Position Sensor - - 57.33mm 48.3mm 17.7mm 57.33 x 48.3 x 17.7 mm
RS Stock No. 917-2671
Mfr. Part No.PTI40020
BrandCelduc
$22.74
Each
units
Magnetic Proximity Sensor Cylindrical M8 25mm - - -
RS Stock No. 124-3805
BrandBALLUFF
$41.20
Each
units
Micropulse Transducer Round 32 mm - - 8mm 32 (Dia.) x 8 mm
RS Stock No. 331-8168
Mfr. Part No.RSH01
BrandAssemtech
$1.19
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 12.7mm 1.57mm 3.17mm 12.7 x 1.57 x 3.17 mm
RS Stock No. 784-0029
Mfr. Part No.DM25-32-07
$30.34
Each
units
Magnetic Sensor Round 32 mm - - 7mm 32 (Dia.) x 7 mm
RS Stock No. 917-2640
Mfr. Part No.PCC26720
BrandCelduc
$30.09
Each
units
Magnetic Proximity Sensor Cylindrical M12 80mm - - -
RS Stock No. 536-1732
BrandRS PRO
$2.56
Each
units
Transducer Rectangular - 20mm - - -
RS Stock No. 290-0621
Mfr. Part No.MAG-3015-B
BrandSick
$21.32
Each
units
Magnetic Proximity Sensor Cylindrical 31 mm 15mm - - 31 x 15 mm
RS Stock No. 536-1748
BrandRS PRO
$5.31
Each
units
Transducer Rectangular - 28.6mm 19mm 6.3mm 28.6 x 6.3 x 19 mm
RS Stock No. 285-245
BrandRS PRO
$8.72
Each
units
Proximity Switch Rectangular - 32mm 24mm 10mm 32 x 24 x 10 mm
RS Stock No. 794-9520
Mfr. Part No.GLS-M1
BrandOmron
$30.33
Each
units
- - - 50mm 14mm - -
RS Stock No. 124-3807
BrandBALLUFF
$57.36
Each
units
Micropulse Transducer Rectangular - 55mm 20mm 21mm 55 x 20 x 21 mm
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