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.

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.

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.

No electricity or batteries are needed—as your door opens, the magnet and contact disc are separated, sounding a mechanical chime. The chime can be deactivated.

A chime announces when someone passes through the infrared light beam and a counter keeps track of each entrance and exit. Mount the transmitter and beam reflector between 2 and 20 feet apart. The chime's volume is adjustable up to 85 dB. It cannot be sold to California due to local energy efficiency regulations.

Additional chimes (sold separately) can be added to the transmitter.

Arm and disarm these alarms with a key. They sound an alarm when a door is opened without authorization and the alarm and magnetic contact are separated. All require a mortise lock cylinder (sold separately) for operation.

Mount an optional rim lock cylinder (not included) on the opposite side of the door to arm and disarm these alarms from the outside.

Attract more attention with a strobe light as well as an audible alarm. Arm and disarm these alarms with a key. They sound an alarm and emit short, intense bursts of light when a door is opened without authorization and the alarm and magnetic contact are separated. All require a mortise lock cylinder (sold separately) for operation.

Mount an optional rim lock cylinder (not included) on the opposite side of the door to arm and disarm these alarms from the outside.

Arm and disarm these alarms with a programmable code. They sound an alarm when a door is opened without authorization and the alarm and magnetic contact are separated.

An optional exterior keypad (sold separately) allows the alarm to be armed and disarmed from the outside.

Replace existing transmitters or team a transmitter and a receiver (not included) to remotely operate your automatic overhead door openers.

Universal transmitters are compatible with Chamberlain, Craftsman, Genie, Liftmaster, Multicode, and Stanley openers. They can operate two door openers.

DIP-switch transmitters are compatible with Liftmaster openers that have a DIP-switch receiver. Use them to operate a single door. The three-button model has open, close, and stop functions.

Rolling-code transmitters are compatible with Liftmaster openers that have Security+ 2.0 technology, which sends a new code with each use. The three-button model can operate three door openers. The four-button model is like two remotes in one—it's designed to operate one gated entrance plus three door openers.

If you don't have your remote, you can still open and close automatic overhead doors with a private 4-digit PIN. Use these transmitters to operate one transmitter or receiver. The keypad is backlit for visibility in the dark.