Prevent unauthorized use—these switches require coded magnets (sold separately) to actuate, and cannot be bypassed using ordinary magnets. They actuate when a magnet comes within sensing distance, and reset when the magnet moves away. Mount the switch in a stationary position, such as a door frame, and mount the magnet to a movable object, such as the door. They’re often used to detect when a door or window opens, and can be used with movable machine guards. All are rated IP67 for protection from temporary submersion.

Switches with an LED status indicator light up when they’re actuated, so you can see if they’re wired correctly with a quick glance.

Coded magnets include tamper-resistant one-way screws for mounting. To remove screws, see one-way bits and drivers.

Safety relays are required in safety applications with switches that control two or three circuits.

For technical drawings and 3-D models, click on a part number.

Wire contacts to an alarm system to alert when doors or windows are opened. Mount the magnet to the door or window and mount the switch to the frame. The alarm will activate when the magnet is pulled away by the opening door or window.

SPDT switches connect to an alarm system and to another device, such as a motion detector.

Prevent unauthorized use of doors or windows with a combination of coded magnets and contacts that wire to an alarm system. The coded magnets mean they can’t be bypassed with regular magnets. These switches actuate when the magnet comes within sensing distance of the switch and reset when the magnet moves away. Mount the magnet to your door or window and the switch to the frame. Connect the switch contacts to an alarm system, which will trigger when the magnet is pulled away as your door or window is opened.

Flush-mount switches are designed to mount against the door jam. They have a cord grip to reduce strain on your cord.

Surface-mount switches mount on the surface of your door. Those with a 1/2 conduit connection are ready to directly attach to your conduit.

For technical drawings and 3-D models, click on a part number.

Use a free, downloadable app with these switches to automate alarms in your facility, such as sounding a buzzer if a trailer door is opened after a certain time. These switches link to your Wi-Fi network and push notifications to your smartphone. They have two parts: a magnet and a sensor. Mount each part to a surface—for instance, the magnet to a door and the sensor to the door frame—and the switch will send a signal when the magnet is pulled away.

For technical drawings and 3-D models, click on a part number.

Mounted to your circuit board, these switches trigger when magnetic components get near, and reset as they move away. They’re often used to turn on electronics, such as starting up a laptop when you open it. To install, push the contacts through holes in a circuit board, then solder them in place.

Switches with a plastic housing withstand impact better than switches with a glass housing. The plastic also forms an airtight seal to block out contaminants. Use them in dusty or dirty environments where an optical switch might fail.

For technical drawings and 3-D models, click on a part number.

These switches detect magnetic objects—or objects with a magnet attached—through non-magnetic walls. They’re often used to count magnetic items on a conveyor belt that are too far for other proximity switches to detect and in food plants to track cleaners through stainless steel pipe. Producing a PNP signal output, these switches are commonly used with programmable logic controllers (PLCs). Resistant to dust, heat, and vibration, switches will stand up to harsh environments. Magnets are sold separately.

Maximum sensing distance in the table below represents switches used with the magnet shown. Sensing distance will vary depending on the magnetic strength of the object your switch is detecting.

For technical drawings and 3-D models, click on a part number.