Magnetic Door Contacts | McMaster-Carr

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172 Products

Magnetic Switches

Magnetic Contact Alarm Switches

Wire to an alarm system to get alerts when doors or windows are opened

12 products

Magnetically Actuated Switches

Actuate when a magnet comes nearby, such as when a door or window opens

90 products

Smart Magnetic Contact Alarm Switches

An app automates alarms, such as sounding a buzzer if a trailer door opens after hours

1 product

Tamper-Resistant Magnetically Actuated Switches

Require coded magnets to actuate and cannot be bypassed using ordinary magnets

12 products

Circuit Board Magnetically Actuated Switches

Mount to your circuit board to activate electronics

2 products

Tamper-Resistant Magnetic Contact Alarm Switches

Prevent unauthorized use with coded magnets and contacts that wire to an alarm system

3 products

Other Products

Safety Switches

Protect people by cutting power to machines when access doors open; also known as interlock switches

9 products

Proximity Sensors

Detect the presence or position of objects from a short sensing distance

16 products

Audible Door Alarms

An alarm sounds if someone opens a door without using the code or key

7 products

Cam Locks

Unlock with a key, magnetic fob, screwdriver, or number combination

18 products