Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy Installation | Base Station Required

Bought a multi-pack of these contact sensors for our new (to us) house. I used Ring motion sensors on the first floor rooms and these contact sensors on four of the first floor doors. Precisely one contact sensor actually worked. I was swapping out sensors and worked my way through the six-pack. All but one of the sensors went into "Tampered" mode and even with Ring support trying to help me over the phone, we could not get the sensors workings. Have a metal door that you want to monitor? Don't use Ring. Have a door that you need to slam to get the latch to latch? Don't use Ring. I out four brand new sensors on my wooden French doors and all four sensors went to "Tampered" status. I asked Ring support if the Ring central base station has some kind of "memory" for when a location/sensor goes into "Tampered" mode. I never did get an answer. I have a lot of money wrapped up in this system, so I will be installing another motion sensor inside the house to make up for not having sensors on the first floor doors. I wish I had gone with a hardwired ADT system. UPDATE 02/06/2026: Lesson learned. After posting my review here, Ring technical support arranged a telephone support call and we worked through my issues with two contact sensors. Sensor #1 was mounted on a slightly curved moulding, which when I tightened the mounting screws for the sensor bracket caused the bracket to deform. The Tampered switch was not being depressed completely. This was my installation error. Once I mounted the sensor on a flat strip of wood on the hinge side of the door, it reset and works perfectly. Sensor #2 is on a metal garage door and I had glued too thin of a strip of wood to the door. Once I added an additional thickness of wood strip, the metal door no longer impacted the sensor. I remounted the sensor and the Tampered switch reset the sensor. it is working perfectly fine. Lessons learned: Ring contact sensors work best on an absolutely flat mounting surface. Mounting on a metal surface requires a wooden "spacer" to prevent the metal from messing with the sensors signal (I used one-gallon and five-gallon paint stirrer sticks cut to the length of the sensor. Free and easy to work with and already the correct width.) My thanks to Jose at Ring for being patient and working through these issues.

These Ring Alarm Contact Sensors (2nd Gen) in the 2-pack are a must-have add-on for any Ring Alarm system. Super easy to install and provide instant alerts when doors or windows open—perfect for securing entry points. Pros: • Ultra-simple DIY install — Peel-and-stick mounting (or screws if preferred), no tools needed; pairs quickly with the Ring app in minutes. • Slim, discreet design — Much smaller than 1st gen, fits nicely on any frame without looking bulky. • Long battery life — Up to 3 years on included CR2032 batteries; reliable performance with minimal maintenance. • Instant, accurate alerts — Works flawlessly with Ring base station for real-time notifications (subscription required for full features). • Great value — Affordable pack expands coverage easily; high ratings (4.7+ on Amazon from thousands) prove reliability. Cons: • Requires Ring Alarm base station — Not standalone; needs the system to function. • Gap tolerance improved but check alignment — Handles up to ~1 inch separation reliably, but occasional false alarms if not mounted perfectly (rare). • Subscription for advanced features — Basic alerts work, but recording/history needs Ring Protect plan. If you’re building out your Ring Alarm setup for home security, this 2-pack is spot-on—reliable, affordable, and integrates seamlessly. Highly recommended—solid 5 stars!

The Ring Alarm Contact Sensor 2‑Pack is a fantastic addition to my home security setup. Installation was quick and easy, and the sensors work flawlessly with my Ring system. What really impressed me with this new version are the battery protectors — they’re an awesome improvement that add an extra layer of tamper protection. It gives me peace of mind knowing that the sensors are not only reliable but also harder to interfere with. The design is sleek, compact, and blends in well with doors and windows. Notifications are instant, and the sensors have been rock‑solid since I installed them. Ring clearly listened to customer feedback and made meaningful upgrades. Highly recommend this 2‑pack for anyone looking to strengthen their home security!

works great replaced a first generation with this one. easy set up. great price too.

Great device for securing my home. Just wish they were priced better as it’s super expensive to buy one for each window and door where you may have 40+ to secure in your home. I focused on the most important ones. Setup is fairly easy, though the app forces you through many steps that aren’t needed after you’ve setup one or two and know what to do.

Worked as expected and easy to add to your Ring alarm system. However they are not 2nd Gen as described. They are really 2.1 Gen as they are a little bit different from the older 2nd Gen. I have the older 2nd Gen sensors and one failed so I ordered these to replace it. My idea was to remove the failed sensor and then slide this one onto the old mount that is glued to the window. The problem is this version does not work with the older mount which means it must be removed from the window then the new one installed. This version has a plastic cover that screws down over the batteries where the older version does not. Plus the slide portion of the sensor is a bit different so the mount between the two are not the same.

Z-wave is wonderfully reliable, having a base station and an extender ensures that all instances of change are tracked, even if the Wi-Fi goes down, and that the base alarm will activate with or without it. Z-wave is why I go with Ring for my exterior alarming, rather than Wi-Fi. Zigbee would probably work plenty well enough, when I can eventually figure out how to set up an MQTT server to take it offline and self-reliant, but the Ring station is prebuilt and already accomplishes the task out-of-the-box, so yay. Of course, still need Wi-Fi to check the logs, but arming/disarming can be done from the keypad even without Wi-Fi, and if Wi-Fi's online, it can be done from the phone app. Robust and convenient. The developer's mindfulness to allow for backwards-compatibility with prior versions is commendable, too. I like complicated setups, but I like simple setups, too.

The Ring Alarm Contact Sensor (2nd Gen) is an excellent addition to my home security setup! Installation was a breeze—I simply attached the sensors to my doors and windows, and they immediately synced with my Ring Alarm system. The setup process was simple, and the app made it incredibly easy to monitor and control. What I really love about these sensors is how responsive they are. I get instant notifications on my phone if a door or window is opened, which is exactly what I need to stay alert when I'm not home. The sensors are small, discreet, and blend in well with my home’s decor without drawing too much attention. The battery life has been great so far, and I appreciate that they’re designed to last. I also feel more secure knowing I can integrate the sensors with my entire Ring system, giving me full control over my home’s security. Whether I’m inside or away from home, I always know when the system is triggered. If you're looking for an easy-to-use, effective contact sensor for your Ring system, I highly recommend the Ring Alarm Contact Sensor (2nd Gen). It’s a great way to enhance your home security.

The Ring Alarm Contact Sensor 2-pack (2nd Gen) is a fantastic addition to my home security setup. Installation was a breeze, and they work seamlessly with the Ring Alarm system. They are compact and responsive, alerting me immediately when doors or windows are opened. Pros: Easy Installation: Simple setup with no tools required. Seamless Integration: Works perfectly with the Ring Alarm system for instant alerts. Con: Requires Ring System: Only compatible with the Ring Alarm, so it’s limited if you don’t have that setup. Highly recommend for anyone using Ring Alarm to boost their home security!

I purchased these sensors to add to my security system. Super easy to connect to base station and configure. A bit challenging to mount on an inswing recessed door. I ended up chiseling a small hole in the door jamb to insert the magnet and mounted the sensor portion to the door. For installation on windows, I was able to mount the 2 pieces and right angles to each other and still have reliable pickup/dropout of the contact.

I’ve got these Ring contact sensors on all my accessible windows, and they’ve been awesome overall. Installation was super easy—just stick them on and connect through the app. The batteries last a long time (I usually get over a year before needing to swap them), and replacing the battery when it’s time is quick and painless. The app is also loaded with options, and I really appreciate the tamper detection—it gives me peace of mind knowing I’ll get an alert if someone tries to mess with the sensors. Out of all the ones I have installed, I only had one that went “bad” and started burning through batteries every few days. I reached out to Ring support, and they replaced it right away with zero hassle, which was impressive. My only minor gripe is that the adhesive on the bottom isn’t the strongest—I’d recommend using stronger double-sided tape or screws if you want it to stay put long-term. Overall, though, these sensors work exactly as advertised and fit seamlessly into the Ring system. TL;DR: Easy install, battery lasts over a year, simple battery replacement, lots of app features, and tamper detection. Had one defective unit but support swapped it instantly. Only downside is weak adhesive. Still a great addition to any Ring setup.

This product is awesome, it does exactly what I need it to do! It gives me the comfort I need to sleep soundly at night. It was easy to install, the instructions are very simple to understand and it was easy to connect to my phone. Ill always know when my doors get opened amd it's a great feeling!

It was added to my Ring system without an issue. Ring customer support is great, too, when I need technical help.