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. 536-1710
BrandRS PRO
MYR4.75
Each
units
Transducer Cylindrical 4 mm 19mm - - 4 x 19 mm
RS Stock No. 339-768
BrandRS PRO
MYR34.45
Each
units
Magnetic Proximity Switch Rectangular - 38mm 10mm 25mm 38 x 25 x 10 mm
RS Stock No. 361-4927
BrandRS PRO
MYR15.37
Each
units
Proximity Switch Rectangular - 32mm 8mm 15mm 32 x 8 x 15 mm
RS Stock No. 285-245
BrandRS PRO
MYR28.22
Each
units
Proximity Switch Rectangular - 32mm 24mm 10mm 32 x 24 x 10 mm
RS Stock No. 536-1732
BrandRS PRO
MYR7.50
Each
units
Transducer Rectangular - 20mm - - -
RS Stock No. 536-1748
BrandRS PRO
MYR10.56
Each
units
Transducer Rectangular - 28.6mm 19mm 6.3mm 28.6 x 6.3 x 19 mm
RS Stock No. 361-7011
BrandRS PRO
MYR13.85
Each
units
Proximity Switch Cylindrical 11 mm 28mm - - 11 x 28 mm
RS Stock No. 811-0745
BrandRS PRO
MYR9.33
Each
units
Linear Actuator Rectangular - 32mm 13mm 8mm 32 x 13 x 8 mm