A Ring Alarm Contact Sensor protecting a sliding glass door inside a modern home

Tips for Installing Contact Sensor (2nd Gen)

Mount your Contact Sensor (2nd Generation) on a door or window, even those with uncommon frames, sizes, structures, mouldings or even basement windows.

Get to know your Contact Sensor (2nd Generation)

The Ring Alarm Contact Sensor (2nd Generation) is made up of two separate parts: the sensor and the magnet. When you hold the Contact Sensor and magnet together then pull them apart, you should see the LED ring flash green just once, and hear a small chirp tone from the Base Station. (Chirp tones are enabled by default). 

For your Ring Contact Sensor (2nd Generation) installation to work as designed, it's important to remember that: 

  1. You can mount your Contact Sensor around almost any part of your door or window.
  2. The space between the Contact Sensor and the magnet must be 1 inch or less. 
  3. When you open the door or window, you see the LED flash green (and hear the chirp tone, if enabled).
  4. There needs to be ½ inch of space around the sensor so you can slide it open to replace the batteries. 
  5. Avoid the side of the door with the hinges.
  6. Skip areas close to a mail slot to prevent someone from reaching in and tampering with the sensor.
  7. Avoid mounting on clear glass windows to prevent intruders from identifying your security measures.
  8. Steel doors and aluminum door frames may occasionally cause interference for the Contact Sensor. Test the sensor on your door or window to determine if there are any issues. 

How to mount your Contact Sensor (2nd Generation)

Mount either the Contact Sensor on the door or window, and the magnet on the frame, or switch them around.

Contact Sensor (2nd Gen) right frame mounting.Contact Sensor (2nd Gen) left frame mounting.

For curved or decorative moulding:

  • Mount the Contact Sensor or magnet at an angle on curved or decorative moulding.

Contact Sensor (2nd Gen) angled frame mounting.Contact Sensor (2nd Gen) curved frame mounting.

For a closed window or door that is not flush with the frame or moulding:

  • Use an offset mount for the Contact Sensor and magnet if the closed window or door doesn’t match up with the frame or moulding.
  • Make sure that the Contact Sensor and magnet are less than 1 inch apart, and you see the LED blink and hear the chime when you open the door or window.

Contact Sensor (2nd Generation) offset mounting side.Contact Sensor (2nd Generation) offset mounting front.

Rotate the magnet or sensor for a more secure fit.

Contact Sensor (2nd Gen) rotated horizontal frame mounting.Contact Sensor (2nd Gen) rotated vertical frame mounting.

Rotate the Contact Sensor or the magnet so they meet at a right angle.

  • In order to make these fit, your Contact Sensor may need to be mounted about 3/4" in from the edge of the door or frame. These images illustrate how to get creative:

Contact Sensor (2nd Gen) mounted at right angle.Contact Sensor (2nd Gen) mounted at right angle.

Contact Sensor (2nd Gen) mounted at right angle.Contact Sensor (2nd Gen) mounted at right angle.

Basement windows:

  • Installing the Sensor on your window frame and the magnet on the window might work for you, as long as there's enough room for you to slide off the Sensor to change the batteries.
  • If you have a basement window, be careful not to leave the window open during rain or snow. Water can damage the Contact Sensor. 

French doors:

  • Place the Contact Sensor on one door, and the magnet on the other:

Contact Sensor (2nd Gen) mounted at top of French door.Contact Sensor (2nd Gen) mounted at bottom of French door.

Using a Ring Alarm Contact Sensor Riser

If you are still having problems getting your Contact Sensor positioned correctly, a Ring Alarm Contact Sensor Riser (sold separately) could be the solution. Window and door finishes are sometimes uneven and prevent the sensor and magnet from being within the required 1-inch maximum detection gap.

Contact Sensor riser back.Contact Sensor riser front.

The Riser adds 3/8th inch (10mm) in height to the Contact Sensor. It also comes with an additional Magnet that is 3/8th inch (10mm) taller than your original one. Use these accessories as needed to improve the positioning and function of your Contact Sensor. Reminder, Contact Sensor is an indoor-only device.

How to install the Contact Sensor Riser

Contact Sensor riser illustration.
1. Disarm your Ring Alarm system using the Ring app or Keypad.
2. Slide the Contact Sensor off of its mounting bracket.
3. Attach the mounting bracket to the Riser. Make sure it snaps in securely.
4. Slide the Sensor onto the Riser. Make sure it slides in completely.
5. Install the Sensor and Magnet on your window or door and make sure that they are within the required 1-inch maximum detection gap.
6. Open your door or window to confirm that the Contact Sensor detects when the door or window is opened and closed.