Door Sensors | McMaster-Carr

	Switching Voltage Switching Voltage

30V AC

100V AC

120V AC

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) or 1 On
(Normally Closed)

1 Off (Normally Open) and 1
On (Normally Closed)

1 Off (Normally Open) and 2
On (Normally Closed)

1 On (Normally Closed)

	Sensor Type Sensor Type

Magnetic

Magnetic Contact

Light Beam

	Housing Material Housing Material

	Wire Connection Type Wire Connection Type


Wire Leads	Screw Terminals

	Maximum Sensing Distance Maximum Sensing Distance

	Mount Type Mount Type

Screw

Adhesive

Press Fit

	Environment Environment

	Length Length

	Number of Wire Leads Number of Wire Leads

	Industry Designation Industry Designation

	Color Color

	White		Gray
	Brown		Black
	Dark Brown

	Switching Current Switching Current

	Number of Circuits Controlled Number of Circuits Controlled

	Voltage Voltage

	Width Width

	Specifications Met Specifications Met

CE Marked

CSA

	Environmental Rating Environmental Rating

	Height Height

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Wire Lead Length Wire Lead Length

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Diameter Mounting Hole Diameter

View catalog pages (6)

Forward

How can we improve?

104 Products

Choosing an Electrical Switch

Magnetic Contact Alarm Switches

Wire contacts to an alarm system to alert when doors or windows are opened.

Magnetically Actuated Switches

These switches actuate when a magnet comes within sensing distance, and reset when the magnet moves away.

Tamper-Resistant Magnetically Actuated Switches

Prevent unauthorized use—these switches require coded magnets to actuate. They cannot be bypassed using ordinary magnets.

Close-Proximity Audible Alarms

Magnetic-Contact Door Chimes

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

Motion-Sensing Door Chimes

A chime announces when someone passes through the infrared light beam and a counter keeps track of each entrance and exit.

Keypad-Controlled Door Alarms

Arm and disarm these alarms with a programmable code.

Key-Controlled Door Alarms with Strobe Light

Attract more attention with a strobe light as well as an audible alarm. Arm and disarm these alarms with a key.

Key-Controlled Door Alarms

Arm and disarm these alarms with a key.

Facility Door Closers, Openers, and Holders

Receivers for Remote and Keypad Transmitters

Wire these receivers directly to your automatic overhead door openers for their power supply.

Keychain Remote Transmitters

Conveniently carry your transmitter with your keys to remotely operate automatic overhead door openers.

Automatic Overhead Door Openers

Also known as jackshafts, these openers operate 24-ga. or thinner overhead doors.

Keypad Transmitters

If you don't have your remote, you can still open and close automatic overhead doors with a private 4-digit PIN.

Remote Transmitters

Replace existing transmitters or team a transmitter and a receiver to remotely operate your automatic overhead door openers.

Internet Gateway for Automatic
Overhead Door Openers

Use a smartphone or computer to control up to 16 Liftmaster automatic overhead door openers that are MyQ-enabled. Download the free MyQ mobile app to track activity and operate your doors remotely.

Fire Alarm-Activated Wall-Mount Door Holders

For use with doors that already have a closer, these holders keep doors open with an electromagnet. When activated by a fire alarm, the magnet shuts off and releases the door.

Automatic Door Openers

Nudge your door and these openers will open it the rest of the way.

Choosing an Electrical Switch

Magnetically Actuated Switches

Magnetic Contact Alarm Switches

Magnetically Actuated Switches

Tamper-Resistant Magnetically Actuated Switches

Close-Proximity Audible Alarms

Magnetic-Contact Door Chimes

Motion-Sensing Door Chimes

Keypad-Controlled Door Alarms

Key-Controlled Door Alarms with Strobe Light

Key-Controlled Door Alarms

Facility Door Closers, Openers, and Holders

Receivers for Remote and Keypad Transmitters

Keychain Remote Transmitters

Automatic Overhead Door Openers

Keypad Transmitters

Remote Transmitters

Internet Gateway for AutomaticOverhead Door Openers

Fire Alarm-Activated Wall-Mount Door Holders

Automatic Door Openers

Internet Gateway for Automatic
Overhead Door Openers