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Ring Alarm Contact Sensor (2nd Gen)

4.7 out of 5 stars 12,074 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice for "ring sensor"

Price: $24.99
1-Pack Contact Sensor

Enhance your purchase

  • Get instant mobile alerts when doors and windows open in your home
  • Now smaller to enable increased placement options
  • Easy installation with no tools required
  • Mounts to door and window frames
  • Includes two 3V CR2032 batteries
  • Requires the Ring Alarm Base Station

Technical Details

Contact Sensor

Power

CR2032 coin cell batteries

Battery life

Approximately 3 years

Max distance between sensors

25 mm (1 in). Leave 13 mm (0.5 in) space on non-magnet side to access battery compartment

Operating conditions

Indoor use, 0°C to 49°C (32°F to 120°F)

Dimensions

40 mm x 53 mm x 14 mm (1.56 in x 2.09 in x 0.55 in)

Installation

Mounts to doors and windows (Ring Alarm kit required)

Connectivity

Z-Wave (76 m or 250 ft range to Base Station open air, line of sight)

Warranty and service

1-year limited warranty and service included. Use of Ring Alarm kit is subject to the terms found here.

Support

Click here to view more information on the Ring Alarm Kit support page.

For monitoring licenses, visit ring.com/licenses.

Manufacturer: Ring LLC
Manufacturer Place of Business: Santa Monica, CA 90404, USA


Customer Questions & Answers

Customer reviews

4.7 out of 5 stars
4.7 out of 5
12,074 global ratings
How are ratings calculated?

Top reviews from Canada

Reviewed in Canada on June 11, 2020
Style: 1-Pack Contact SensorVerified Purchase
20 people found this helpful
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Reviewed in Canada on May 23, 2020
Style: 2-Pack Contact SensorVerified Purchase
16 people found this helpful
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Reviewed in Canada on July 6, 2020
Style: 2-Pack Contact SensorVerified Purchase
13 people found this helpful
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Reviewed in Canada on November 23, 2020
Style: 2-Pack Contact SensorVerified Purchase
9 people found this helpful
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Reviewed in Canada on March 12, 2021
Style: 2-Pack Contact SensorVerified Purchase
One person found this helpful
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Reviewed in Canada on December 4, 2020
Style: 1-Pack Contact SensorVerified Purchase
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5.0 out of 5 stars Works with SmartThings
By R. Cole on December 4, 2020
After reading a bunch of forums, I can confirm that Ring Door Sensors work with SmartThings. BUT take WARNING, you need to know how to access the SmartThings API graph. After enrollment, the device has no purpose on SmartThings. You need to accesss the graph and under Devices, find the Ring Door Sensor, Edit, and change the Device Type to Z-Wave Door Sensor. Shows Open/Close and Battery Level in the SmartThings app.
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2 people found this helpful
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Reviewed in Canada on July 28, 2020
Style: 1-Pack Contact SensorVerified Purchase
2 people found this helpful
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Reviewed in Canada on June 25, 2021
Style: 2-Pack Contact SensorVerified Purchase
One person found this helpful
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Top reviews from other countries

devbadger
5.0 out of 5 stars Much better aesthetically but install configuration may need to be different from Gen 1
Reviewed in the United States on May 4, 2020
Style: 2-Pack Contact SensorVerified Purchase
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5.0 out of 5 stars Much better aesthetically but install configuration may need to be different from Gen 1
Reviewed in the United States on May 4, 2020
I finally pulled the trigger on purchasing the security system to go with my 6 wired stick up cams and I am glad I waited for second generation for aesthetic reasons alone.

These sensors are much less bulky and accessing the batteries will be easier that Gen 1 IF YOU INSTALL THEM CORRECTLY. In my mind I originally wanted to place the sensor side on the frame of the window's outer casing with the logic that the sensor should be stationary and the smaller magnetic side should move with the window pane but this was problematic because to access the batteries, i would have to slide the sensor to the left but it is right next to the corner of the wall. I installed that one incorrectly and will need to eventually pull off the sensor and swap the sensor and magnetic strip. The rest I installed so the sensor was on the window pane's frame and that resolved the issue. *see pictures*

Also worth noting, the Gen2 sensors seem to be more sensitive than the Gen1, which I see as a plus. When the sensor and the magnet are perfectly aligned, it only takes a little more than an inch of travel to trip the Gen 2. Some of my Gen1 sensors take almost 2.5 - 3 inches to trip.
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176 people found this helpful
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Geno
1.0 out of 5 stars Badly designed and not an improvement on 1st gen sensors
Reviewed in the United States on May 2, 2020
Style: 2-Pack Contact SensorVerified Purchase
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1.0 out of 5 stars Badly designed and not an improvement on 1st gen sensors
Reviewed in the United States on May 2, 2020
I love the Ring alarm system so it pains me to leave this review, but I must say that these new contact sensors are not designed well and I will be returning them and purchasing more of the 1st gen version. These are too wide to fit on my window frame (which I assume is a generic, normal window frame), and they expect you to leave an extra half inch to access the battery compartment. See photos for what I'm talking about.
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134 people found this helpful
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Tara M Landers
1.0 out of 5 stars System goes offline 1 to 2 times per hour
Reviewed in the United States on May 5, 2020
Style: 1-Pack Contact SensorVerified Purchase
116 people found this helpful
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Stacie Renshaw
5.0 out of 5 stars Excellent for doors and double hung vinyl windows.
Reviewed in the United States on May 9, 2020
Style: 2-Pack Contact SensorVerified Purchase
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5.0 out of 5 stars Excellent for doors and double hung vinyl windows.
Reviewed in the United States on May 9, 2020
These sensors are a fantastic upgrade from the first generation, for certain applications...

They fit wonderfully on my doors and are less visible because of their smaller size. I do wish the ring logo was placed somewhere else (maybe on the side) because I would prefer it to be upright.
The word RING upside down makes it look like it wasn’t designed to be installed that way.

My only real complaint though would be the size of the device. In my current rental home we have single hung vinyl windows, and these devices will not attach in a convenient, non-obtrusive way. They stick out on the glass and are very visible. I decided to stick with the older version for my windows and only ordered these new ones for my doors.

If you aren’t sure which ones will be best for you I encourage you to take the time to measure and tape together some cardboard or paper mock-up versions of both... just so you can place them and see how they’ll look. It’ll save you some time and stress.
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108 people found this helpful
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Matthew G A Vogelpohl
1.0 out of 5 stars can't recommend buying these at the moment
Reviewed in the United States on May 12, 2020
Style: 2-Pack Contact SensorVerified Purchase
101 people found this helpful
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