Alarm Window and Door Contact Sensor - White

Alarm Window and Door Contact Sensor - White Ring Alarm Window and Door Contact Sensor mounted on a dark door frame with a frosted glass window visible.

Alarm Window and Door Contact Sensor - Hands installing a white Ring Alarm Window and Door Contact Sensor on a white door frame.

Alarm Window and Door Contact Sensor - Hand installing a white Ring Alarm Window and Door Contact Sensor on a window frame.

Best Seller

Alarm Window and Door Contact Sensor

Name: Alarm Window and Door Contact Sensor
Brand: Ring
SKU: B07ZB2QLC2
Price: 19.99 USD
Availability: InStock

4.7

17,185

$19.99

Take up to 18 months to pay with as low as 0% APR on some term lengths and no late fees. Prequalify now.

Expand your Ring Alarm system to secure each door and window in your home, and get alerts as soon as they open.

Please note:

Requires Ring Alarm or Ring Alarm Pro

Make sure the doors and windows are shut.

Ring Alarm Contact Sensors easily mount to any door or window frame in your home for easy, DIY installation. With real-time alerts from the Ring App when your Sensors separate, you’ll always be the first to know when something’s ajar.

Plus, if you’ve enrolled in our optional Alarm Professional Monitoring¹, you can choose to receive a call from the monitoring center when the Contact Sensor is triggered and request emergency assistance if needed.

Requires Ring Alarm or Ring Alarm Pro Security Kit.
Triggers your Alarm when someone tampers with Contact Sensors.

Ring Alarm Contact Sensor mounted on a white-framed glass door, with a blurred green outdoor background visible.

Tech Specs - Contact Sensor

Supported Devices

Setup Requirement

Requires Ring Alarm or Alarm Pro (sold separately)

Size

Dimensions

2.09 in X 1.12 in X 0.55 in

Power and Connectivity

Power

2 CR2032 Coin cell batteries

BATTERY WARNING: KEEP OUT OF REACH OF CHILDREN. Store spare batteries securely. Dispose of used batteries immediately and safely. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.

Battery Life

Uses two CR2032 batteries, included, which may last up to 3 years depending on usage. Cold temperatures may drain battery life faster.

Operating Conditions

32°F to 120°F (0°C to 49°C)

Connectivity

Z-Wave (250-foot range to Base Station open air, line of sight)

Installation

Operating Conditions

Indoor use

Mounting

Mounts to doors and windows

Maximum Distance Between Magnet and Sensor

1 inch. Leave 1/2" space on non-magnet side to access battery compartment.

General

Warranty

One-year limited warranty

Frequently Asked Questions

Where does Alarm Window and Door Contact Sensor ship to?

Alarm Window and Door Contact Sensor ships via ground within the U.S. (excluding Alaska, Hawaii, American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands.)

Still Have Questions?

Amazon Customer Reviews

4.7 out of 5

17,185 global ratings

5 star

83%

4 star

11%

3 star

2 star

1 star

About Amazon ratings

Reviews with images

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Everything you want in a single app in the palm of your hand & awsome glowing RING led

Very Disappointed. App is terrible. Not worth the money.

I'm fed up with the Ring Alarm system failures, NO MORE RING CRAP!!!

App completely useless unless you buy subscription

Customer reviews

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Amazon Customer

Verified Purchase

I feel safe

Reviewed in the United States on April 29, 2025

I bought the whole ring security system and I love everything about it. these are all compatible with each other. everything sets up so easily. the design is nice. I feel I can really rely on this system. they are small enough that they are not an eyesore. if feel so safe with this system

Amazon Customer

Verified Purchase

I am in awe of how great the design is.

Reviewed in the United States on September 19, 2020

Easy setup, fine user control, extremely thoughtful design!

I was using smartthings with a mix of smartthings, wink, and other z wave products for my alarm.
This alarm is better in my opinion than anything you can buy professionally or diy.

Design
First off, everythin...g just looks nice and clean. The sensors are slightly wider and taller than my old sensors, but are way thinner which makes them stick out less. I really the design language of everything for the 2nd generation products.

Setup is really fast and easy. I appreciate this because z wave can be super duper finicky and hard/time consuming to setup. The thoughtfulness of design of everything is just bar none better than anything else. For example, starting with the base station, backup battery, cellular free, wifi and ethernet options, and cable management! Both the base station and keypads have cable management which gives options in setup to really make everything look nice! The keypad also can be operated wired or by rechargeable battery which again, awesome. On top of that, the base station comes with a great wall mounting solution that can be used permanent or semi permanent with the charging cable and not have to go through walls. The cable even has a notch to make it easier to pull out!

The sensors are amazing as well. Installation is easy with double sided tape and also the option to hard mount with screws. The detection distance is very good which helps for non aligned installations due to door trim and such. What I really appreciate is they use CR2032 batteries which I can buy almost anywhere. Too much of my other z wave equipment used rare batteries that were not stocked by walmart/target/etc. Also the batteries are easy to change and that is also something that really matters down the line.

Control and Integration
The amount of control has been just amazing as well. There are still improvements to be made, however with Ring they have been constantly improving and i feel like that is a huge benefit to this alarm in that the software will keep maturing.

I use multiple ring outdoor and indoor cameras with a doorbell pro, and schlage smart deadbolts. Together with this alarm, I have been very satisfied with how well you can sync everything up. First off my deadbolts synced up on first try which did not ever happen with smartthings. It is truly wonderful to be able to both arm and disarm my alarm from my deadbolt TouchPad. The ability to set one deadbolt to arm and disarm the ALARM with codes while the 2nd deadbolt doesn't is great. The amount of user control is great, but what makes this really stand out is I don't have to look online for custom schedulers or run iftt to get things to work how they should. You can easily make any single door sensor alert on open or close with a few different sounds. They can be separately configured or be turned all off/on based on alarm mode which is again great.

I already had Ring premium or whatever it is called due to my doorbell and multiple cameras, so this cost me no more than I was already paying. Paying $100 a year for camera and alarm service with cloud storage is a steal. Please don't ever change that.

Overall this has been everything I could have asked for and more. By far the easiest install. What was surprising was how well everything is designed and how well you can control everything to your liking.

I am hoping that my door sensors do not have the issues down the line that I had with other zwave devices. On the plus side, replacing a sensor is again just such a great design. You can just replace the sensor without having to undo any tape or screws due to the design of the sensor mount. Please, whoever designed these, give them a raise! Read more

Amazon Customer

Verified Purchase

Awesome system. Super easy to install!

Reviewed in the United States on January 24, 2022

Hands-down love this system!!! I’m a 69 year old senior woman who’s pretty handy with house projects, and this was, by far, one of the simplest things I’ve done around the house.

I’d had a local company system for over 20 years. Upgrades to cell service (i.e., 5g) was forcing system upgr... Read more

Amazon Customer

Verified Purchase

You Don't Need a Glass Break Sensor!

Reviewed in the United States on May 12, 2020

The Ring 2nd Gen is my first experience with a home install of a security system; however, not my first experience with security systems in general.

If you're somewhat tech savvy you won't have a problem setting this up. The materials provided upon unboxing were sufficient enough to guid...e me to setting up and installing this security system without any prior experience. I am converting over from ADT due to their expensive monthly costs and I was extremely happy to find that the magnet side of the window and doors sensors (the smaller side of the sensor) worked with Ring. What this meant was I only had to replace part of my ADT system, thus making install easier and less time consuming.

Software is easy to use. I was able to figure it out on my own without any instructions.

Some people will complain that Ring doesn't have glass break sensors but coming over from ADT I will tell you that this is a blessing. The biggest false alarm you will get is from glass break sensors, especially if you have kids. I can't tell you how many times I had a false alarm go off because a kid banged their toys around, or screamed at the right tone, or threw a dish into the sink. I understand the need for glass break sensors in certain situations, like a bigger where you might not be able to hear a window break. If you want a glass break sensor there is nothing stopping you from putting a window/door sensor on the glass itself, positioned in a manner that doesn't interfere with the operation of the window. Stick the sensor on the bottom of the window frame and the contact magnet above it directly on the glass. If/when someone smashes the window and clears out the glass to climb thru, it's going to go off. I get that this is not practical for every scenario and every window, but it is an option.

Alexa Guard is another option and while it isn't a true glass break sensor, it is a bit of a backup.

I want to edit to add that I'm a little frustrated with Amazon on the package options and shipping.
I bought the 14 piece kit, however, I did not need the 14 piece kit. I didn't need the 2nd keypad, motion sensor or range extender. All I needed was one the base station, one keypad, one motion sensor, the fire alarm listener and 8 contact sensors. Buying all that stuff separately cost more than the 14 piece kit so I was forced to order it. This is when I became aware that a true 14 piece kit doesn't exist. What Amazon did was ship me an 8 piece kit and then all the other pieces separate, like I wanted to order anyway. They all shipped at different times with the last pieces arriving 5 days after the initial kit. I wish they would have at least arrived at the same time so I could have installed my system all at once, however, doing it this way gave me the chance to see just how easy it is to add on additional devices at any time.

The cellular backup is via AT&T. You'll want to check service at your address. Read more

Amazon Customer

Verified Purchase

Overall - good value, works well

Reviewed in the United States on July 9, 2020

Likes:
- installation is very easy, instructions are clear
- tech support is great. I had one issue and they walked me through it right away.
- I use a ChimePro for the doorbell. Works well, announces visitors.
- Alexa integration works fine.
- the indoor door sensors,... Read more

Back

¹Professional Monitoring is an add-on plan that first requires a compatible Ring Home subscription. Both sold separately. Service available within the U.S. (all 50 states, but not U.S. territories) and in Canada (excluding Quebec). Ring does not own its monitoring center. Smoke and carbon monoxide monitoring is not available for business or commercially zoned addresses. See Ring Alarm licenses at: ring.com/licenses. Additional fees may be required for permits, false alarms, or Alarm Verified Guard Response, depending on your local jurisdiction.

$19.99