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 - 12 of 12 products
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Description Price Application Shape Diameter Length Width Height Dimensions
RS Stock No. 289-7812
Mfr. Part No.PSM BLK
BrandAssemtech
$8.56
Each
units
Proximity Switch Rectangular - 30mm 7mm 20mm 30 x 7 x 20 mm
RS Stock No. 361-5021
Mfr. Part No.S1467
BrandAssemtech
$25.42
Each
units
Hall Effect Switch Cylindrical - 45mm - - -
RS Stock No. 613-8202
Mfr. Part No.MMPSM
BrandAssemtech
$5.34
Each
units
Door Switch, Linear Actuator, Security System Switch Rectangular - 20mm 6mm 14mm 20 x 6 x 14 mm
RS Stock No. 361-5009
Mfr. Part No.S1443
BrandAssemtech
$8.32
Each
units
Hall Effect Switch Rectangular - 30mm 7mm 20mm 30 x 7 x 20 mm
RS Stock No. 331-7597
Mfr. Part No.S1417
BrandAssemtech
$60.19
Each
units
Reed Switch Cylindrical - 50mm - - -
RS Stock No. 331-8174
Mfr. Part No.RSH32
BrandAssemtech
$2.23
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. 289-7856
Mfr. Part No.PRM
BrandAssemtech
$2.12
Each
units
Reed Switch Cylindrical 6 mm 18mm - - 6 x 18 mm
RS Stock No. 331-8613
Mfr. Part No.RSH33
BrandAssemtech
$0.94
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 19.05mm 3mm 3mm 19.05 x 3 x 3 mm
RS Stock No. 866-2583
Mfr. Part No.M1219-1
BrandAssemtech
$1.69
Each
units
- Cylindrical 3 mm - - 1mm 3 (Dia.) x 1 mm
RS Stock No. 866-2586
Mfr. Part No.M1219-2
BrandAssemtech
$1.84
Each
units
- Cylindrical 3 mm - - 2mm 3 (Dia.) x 2 mm
RS Stock No. 331-7604
Mfr. Part No.S1416
BrandAssemtech
$35.88
Each
units
Reed Switch Cylindrical - 50mm - - -
RS Stock No. 331-8168
Mfr. Part No.RSH01
BrandAssemtech
$1.13
Each
units
Filter, Reed Switch, Tachometer, Transducer Rectangular - 12.7mm 1.57mm 3.17mm 12.7 x 1.57 x 3.17 mm