Certified Refurbished Ring Alarm Contact Sensor (2nd Gen) – 2-pack

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Testing and Inspection Process
Each pre-owned device goes through a full diagnostic test, thorough cleaning and inspection, secure data wipe, and replacement of any defective parts identified in testing (where applicable).
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This device was tested by Amazon
Function: Fully functional More details
Battery: Tested and charged, if applicable
Software: Updated during testing

Purchase options and add-ons

  • A Certified Refurbished Ring Alarm Contact Sensor is refurbished, tested, and certified to look and work like new and comes with the same limited warranty as a new device.
  • 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

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Technical Details

Contact Sensor

Power

CR2032 coin cell batteries

Battery life

Approximately 3 years

Max distance between sensors

1 inch. Leave ½” space on non-magnet side to access battery compartment

Operating Conditions

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

Dimensions

1.56 in x 2.09 in x 0.55 in

Installation

Mounts to doors and windows, Ring Alarm Kit required

Connectivity

Z-Wave (250-foot 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. This device receives the same limited warranty as a new device. Learn more about Certified Refurbished Amazon devices. Use of Ring Alarm Kit is subject to terms and conditions.

Support

Click here to view more information on the Ring Alarm Kit support page. For monitoring licenses, visit ring.com/licenses.

Looking for specific info?

Customer reviews

4.7 out of 5 stars
4.7 out of 5
2,097 global ratings

Customers say

Customers like the ease of installation and value of the vdo devices. They mention that it's easy to set up and integrates seamlessly with their existing system. They appreciate the performance and quality of the sensor. They say that it works well and is reliable. Customers are also satisfied with appearance. However, some customers dislike the battery life and have different opinions on size.

AI-generated from the text of customer reviews

Select to learn more
PerformanceEase of installationValueQualitySensorAppearanceSizeBattery life
56 customers mention "Performance"41 positive15 negative

Customers like the performance of the refurbished mouse. They mention that it serves its purpose well, works as well as new, and has no issues. The sensors work just like new ones, and there are no signs of any use. Overall, most are satisfied with the performance and value of the product.

"...Very dependable and easy to mount." Read more

"Refurbished, but works as well as new. Good value." Read more

"...A ring doorbell alone, a ring chime, etc. do not allow the sensors to operate." Read more

"...While they may show some signs of previous use, they are restored to full functionality and come with a warranty for added peace of mind...." Read more

33 customers mention "Ease of installation"33 positive0 negative

Customers find the installation of the vdo device to be easy and straightforward. They say it seamlessly integrates with their existing system and that they have no trouble pairing it with Smartthings. They also say the sensor is reliable and trouble-free to add to their existing alarm system.

"...my expensive alarm monitoring for Ring these sensors are so easy to setup and use. Very dependable and easy to mount." Read more

"...of the door and window sensors but once I got the hang of it the process was simple...." Read more

"...With reliable detection, easy installation, compatibility with the Ring Alarm system, and long battery life, these refurbished sensors provide a cost..." Read more

"...It is an easy and quick upgrade. If you need extra or just adding to you system I would suggest getting theses." Read more

25 customers mention "Value"25 positive0 negative

Customers like the value of the vdo devices. They mention it's good for the money, provides good savings over new, and is cheaper than buying them from Ring. Some say it'll be a good replacement and a perfect addition.

"Refurbished, but works as well as new. Good value." Read more

"The Certified Refurbished Ring Alarm Contact Sensor (2nd Gen) is a cost-effective and reliable solution for enhancing the security of your home...." Read more

"Perfect! Great price & awesome products! Thank you!" Read more

"Great price on something I needed to complete my security system in my new house!" Read more

14 customers mention "Quality"14 positive0 negative

Customers are satisfied with the quality of the vdo devices. They mention that they are solid, reliable, and trouble-free. Some say that the Ring Alarm Contact Sensor is impressive and free of any wear and tear.

"...life of the Certified Refurbished Ring Alarm Contact Sensor is impressive, offering long-lasting performance...." Read more

"Perfect! Great price & awesome products! Thank you!" Read more

"...You can forget they are there, they are so reliable and trouble free. The same applies to the motion detection sensor...." Read more

"...arrived in their original packing with full batteries and free of any wear and tear. I’d highly recommend buy it and save." Read more

12 customers mention "Sensor"12 positive0 negative

Customers are satisfied with the sensor. They mention that it works well, is perfect, and doesn't eat batteries. Some say that the sensors are the most reliable contact sensors they've used. They also say that they're easy to install and add via the Ring app.

"...With reliable detection, easy installation, compatibility with the Ring Alarm system, and long battery life, these refurbished sensors provide a cost..." Read more

"These sensors have been the most reliable contact sensors I’ve used (not with Ring, but with Home Assistant). Highly recommended...." Read more

"Certified Refurbished Ring Alarm Contact Sensor (2nd Gen) – 2-pack works well! I have used these now for nearly a year and have had zero issues...." Read more

"...The Ring sensors have performed well and don't eat batteries so I'm satisfied with my purchase." Read more

7 customers mention "Appearance"7 positive0 negative

Customers are satisfied with the appearance of the vdo devices. They mention that it looks great and is packaged like new.

"...The sensors are compact and discreet, blending seamlessly into the aesthetics of your home...." Read more

"Packaged like new. Works great! These 2nd gen sensors are much more sleek and worth the upgrade." Read more

"...bought two set the are easy to hookup and works really well and look brand new as well and I absolutely love the price can’t go wrong with these..." Read more

"Packaged liked new, looks new, works like new and only paid half of what they usually cost! Good deal!" Read more

7 customers mention "Size"4 positive3 negative

Customers are mixed about the size of the door sensor. Some mention it's the perfect size and works great, while others say it wouldn't fit. The sensors are compact and discreet, blending seamlessly into the aesthetics. However, some customers also mention that the CR code is too small for their iPhone to read and that the 11mm is too deep to fit in the gap between the panes.

"...The sensors are compact and discreet, blending seamlessly into the aesthetics of your home...." Read more

"...11mm is too deep to fit in the gap between the panes...." Read more

"Works Great! Reliable. Would not fit. But......." Read more

"They don't fit every size of window by any means. I returned them and they only returned me $50 of a 60 something dollar purchase...." Read more

15 customers mention "Battery life"2 positive13 negative

Customers are dissatisfied with the battery life of the door sensor. They mention that the batteries die within a month, the new ones were drained within few days, and the sensor dries out in 2 days. Some customers also say that the product is functional but needs new batteries.

"...the sensors just a day or two into my vacation, and the battery died within a couple days of the first alert...." Read more

"...night, while out to dinner, one of them began insisting the batteries were no good. Got home, put new batteries in... and nope! It wasn't having it...." Read more

"One of the sensors drains the battery in 2 days MAXIMUM. I tried 10 different sets of batteries with the same result." Read more

"...Replacing the battery did not fix." Read more

Work Great!!
5 Stars
Work Great!!
Refurbished or not, these work as well as the new ones I installed a few years back. Due to my configuration the sensors do not line up perfectly and this ended up being my issue with the original sensors over time. I could take the sensors off of the door, line them up really close together (1/16th inch) and they would work fine, but otherwise it was a no go. I am assuming over time these start to lose their effectiveness @ any range. Either way, I was having the same problem on two different doors and these refurbished sensors fixed the issue perfectly. Guessing due to my configuration I will have to figure something else out, or replace these every two years or so. As far as installation, just go into settings and remove the old sensor and follow the instructions on the app to add the new one.
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Top reviews from the United States

T. Wiz
5.0 out of 5 stars These are a great value and work well
Reviewed in the United States on June 25, 2024
Configuration: 2-Pack Contact SensorVerified Purchase
In ditching my expensive alarm monitoring for Ring these sensors are so easy to setup and use. Very dependable and easy to mount.
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WoodArtist
5.0 out of 5 stars Works like new.
Reviewed in the United States on June 13, 2024
Configuration: 2-Pack Contact SensorVerified Purchase
Refurbished, but works as well as new. Good value.
One person found this helpful
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Jenni
5.0 out of 5 stars Great for my mother
Reviewed in the United States on April 26, 2024
Configuration: 2-Pack Contact SensorVerified Purchase
My father passed away recently and my mom is now living alone about 2 hours away. She was having trouble sleeping because of being alone and worried about someone breaking into the house. She wanted something simple and this was it. It took some time pairing and setting up all of the door and window sensors but once I got the hang of it the process was simple. I now can monitor from my phone if an alarm is triggered and if it was an accident I can help her shut it off using my phone. This was the case in the beginning but now she has the hang of it. It has given her peace of mind and now I am considering getting a system for my home as well. It would make a great addition to my current system which is just a hammer under the mattress. Definitely recommend
One person found this helpful
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CS
5.0 out of 5 stars Work Great!!
Reviewed in the United States on March 19, 2024
Configuration: 2-Pack Contact SensorVerified Purchase
Refurbished or not, these work as well as the new ones I installed a few years back. Due to my configuration the sensors do not line up perfectly and this ended up being my issue with the original sensors over time. I could take the sensors off of the door, line them up really close together (1/16th inch) and they would work fine, but otherwise it was a no go. I am assuming over time these start to lose their effectiveness @ any range. Either way, I was having the same problem on two different doors and these refurbished sensors fixed the issue perfectly. Guessing due to my configuration I will have to figure something else out, or replace these every two years or so. As far as installation, just go into settings and remove the old sensor and follow the instructions on the app to add the new one.
Customer image
CS
5.0 out of 5 stars Work Great!!
Reviewed in the United States on March 19, 2024
Refurbished or not, these work as well as the new ones I installed a few years back. Due to my configuration the sensors do not line up perfectly and this ended up being my issue with the original sensors over time. I could take the sensors off of the door, line them up really close together (1/16th inch) and they would work fine, but otherwise it was a no go. I am assuming over time these start to lose their effectiveness @ any range. Either way, I was having the same problem on two different doors and these refurbished sensors fixed the issue perfectly. Guessing due to my configuration I will have to figure something else out, or replace these every two years or so. As far as installation, just go into settings and remove the old sensor and follow the instructions on the app to add the new one.
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Customer image
Customer image
One person found this helpful
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Owner
5.0 out of 5 stars 1 of 2 was defective, but Ring replaced it without a hassle
Reviewed in the United States on September 7, 2023
Configuration: 2-Pack Contact SensorVerified Purchase
I installed these on windows just days before going on a two week vacation. I started receiving low battery alerts from one of the sensors just a day or two into my vacation, and the battery died within a couple days of the first alert. I figured the sensor just had bad batteries and replaced them when I arrived home. I don't think more than a few days went by before I again received low battery alerts from this same sensor.

I did not want to remove the other sensor and thought Amazon would require I do so since these were a two-pack. I decided to call Ring instead, and customer service was great. I just needed to provide the SN on the sensor and customer service sent me a replacement. Ring wanted the defective sensor and emailed me a prepaid UPS shipping label. It does not get much more simple than that. Yes, I was out a couple batteries the sensor drained, but I had purchased a multi-pack and had plenty.
14 people found this helpful
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Christopher Stockton
4.0 out of 5 stars Reliable Home Security Enhancement
Reviewed in the United States on July 22, 2023
Configuration: 2-Pack Contact SensorVerified Purchase
The Certified Refurbished Ring Alarm Contact Sensor (2nd Gen) is a cost-effective and reliable solution for enhancing the security of your home. This 2-pack of refurbished sensors provides you with peace of mind at a fraction of the cost of new ones.

With the Ring Alarm Contact Sensor, you can easily monitor the opening and closing of doors, windows, cabinets, and any other entry points in your home. This sensor is designed to detect when a contact is broken, triggering an alert to your Ring Alarm Base Station. In the event of a potential break-in or unauthorized entry, you will be immediately notified through the Ring app, allowing you to take appropriate action.

Being certified refurbished, these sensors have undergone a thorough inspection and testing process to ensure they meet high-quality standards. While they may show some signs of previous use, they are restored to full functionality and come with a warranty for added peace of mind.

The installation process for these contact sensors is simple and hassle-free. They can be easily mounted using the provided adhesive or screws, depending on your preference and the surface you're attaching them to. The sensors are compact and discreet, blending seamlessly into the aesthetics of your home.

One of the advantages of the Ring Alarm ecosystem is its compatibility with other Ring devices. These contact sensors seamlessly integrate with the Ring Alarm system and can be easily controlled and monitored through the Ring app. This allows you to have a centralized hub for all your home security needs, giving you full control and visibility over your home's security status.

The battery life of the Certified Refurbished Ring Alarm Contact Sensor is impressive, offering long-lasting performance. The sensors are powered by a replaceable coin cell battery, which ensures that you won't have to constantly worry about recharging or replacing batteries.

Overall, the Certified Refurbished Ring Alarm Contact Sensor (2nd Gen) - 2-pack is an excellent option for anyone looking to enhance the security of their home while being mindful of their budget. With reliable detection, easy installation, compatibility with the Ring Alarm system, and long battery life, these refurbished sensors provide a cost-effective solution for safeguarding your home.

Overall rating: ⭐⭐⭐⭐
8 people found this helpful
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Amazon Customer
5.0 out of 5 stars Perfect! Great price & awesome products! Thank you!
Reviewed in the United States on June 23, 2024
Configuration: 6-Pack Contact SensorVerified Purchase
Perfect! Great price & awesome products! Thank you!
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J s
5.0 out of 5 stars Great with a few caveats
Reviewed in the United States on March 31, 2024
Configuration: 2-Pack Contact SensorVerified Purchase
These sensors have been the most reliable contact sensors I’ve used (not with Ring, but with Home Assistant). Highly recommended.

A few other reviewers have mentioned the main issue: the sensor can easily fall out of its mount. I use double sided tape to hold them in place.

Another caveat for Home Assistant users is that I cannot get Nabu Casa to share this with Google Home.
One person found this helpful
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