Features
Expand your Ring Alarm system to secure each door and window in your home, and hear chirps as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you’ll always be the first to know when something’s ajar.
Requires Ring Alarm or Ring Alarm Pro, sold separately.
Get alerts on your phone and tablet when doors or windows are opened.
Monitor your home from any iOS or Android device.
Easy installation with no tools required
Includes two 3V CR2032 batteries
Mounts to door and window frames
Get 24/7 emergency police, fire, and medical response when sensors are triggered when you subscribe to Ring Home Standard or Premium, sold separately, and add Alarm Professional Monitoring* to your Plan.
What's Included
Ring Alarm Contact Sensor (2nd Gen) (2-Pack)
Specifications
Key Specs
Detector TypeContactSensor TypeMagneticWireless ConnectivityZ-WaveMaximum Wireless Range250 feetWorks WithAmazon Alexa, RingPower SourceBattery-poweredNumber of Devices Included2
General
Product NameAlarm Contact Sensor (2nd Gen) (2-Pack)BrandRingModel Number4SD2SZ-0EN0ColorWhite
Detection
Detector TypeContactSensor TypeMagnetic
Connectivity
WirelesstrueWireless ConnectivityZ-WaveMaximum Wireless Range250 feet
Compatibility
Works WithAmazon Alexa, RingApp CompatibletrueOperating System CompatibilityAndroid, Apple iOS
Features
PlacementDoor, Window
Power
Power SourceBattery-poweredRechargeable BatteryfalseBattery SizeCR2032Number of Batteries Required2Replaceable BatteryYes
Dimensions
Product Height1.56 inchesProduct Width2.09 inchesProduct Depth0.55 inchesProduct Weight0.2 pounds
Included
Number of Devices Included2
Other
UPC842861111088
Questions & Answers (46)
Q: Can I buy these individually and use them without buying any other ring products? (3 answers)
A: You would need a ring base station. You would then be able to control the sensor with the ring app on your phone.- A: Only if they know where the sensor is positioned on the inside of the window. If they can figure this out, they are getting in no matter what
Q: What is the difference between 1st and 2nd Gen? (2 answers)
A: The 2nd gen are 30-40% smaller, giving you more mounting options. The batteries are also reported to last longer.Q: Can these 2nd Gen sensors be used with 1st Gen Base Station? (5 answers)
A: HELLO! YES THEY DO!! THEY WORK THE SAME THEY ARE JUST SHAPED DIFFERENT!- A: Hello Tina, Great question! This depends on your home's layout and your security preference. We would suggest one for each window that you wish to monitor, using the Ring Alarm system. Here is a helpful article that elaborates on window types and common installation questions: https://support.ring.com/hc/en-us/articles/360043818431-Tips-for-installing-your-Contact-Sensor-2nd-gen-. We invite you to reach out at https://community.ring.com/ if any additional information is needed regarding your Ring Alarm Contact Sensor pre-purchase question. Ring Community is our first peer-to-peer community forum, giving our customers the ability to help one another and share their feedback/experiences with Ring. Thank you, Alexis with Ring
Q: Will these 2nd Gen sensors work with the Ring Alarm Pro coming out in November 2021? (3 answers)
A: Hello pmercado, Great question! Yes. All Ring Alarm 1st and 2nd generation Ring Alarm security devices are compatible with the Alarm Pro, including Contact Sensors, Motion Detectors, Keypads and Range Extenders. You can also use Ring Alarm accessories, including Flood & Freeze Sensors, Smoke & CO Listeners, and Panic Buttons. You will get all Ring Alarm features, including Shared and Guest Users, alerts and notifications, and linked devices. Furthermore, you can also enroll in professional monitoring with SOS, Duress code, and customized police response. A Ring Protect Pro subscription plan is required to enroll in professional monitoring. Here is a helpful support article with other frequently asked questions regarding the Ring Alarm Pro, for your review: https://support.ring.com/hc/en-us/articles/4404638571796 We invite you to reach out at https://community.ring.com/ if any additional information is needed regarding the all-new Ring Alarm Pro. Ring Community is our first peer-to-peer community forum, giving our customers the ability to help one another and share their feedback/experiences with Ring. Thank you, Alexis with RingQ: what kind of batterys do you use (2 answers)
A: This unit uses two CR2032 batteries.- A: Hi nelson. Thanks for asking. The Ring Alarm Contact Sensor requires the Ring Alarm or Ring Alarm Pro. Ring Alarm and all Ring Alarm accessories require a subscription for in-app features and digital notifications, including digital arming and disarming and integration with other Ring, Echo, Alexa, and third-party products. We invite you to reach out to our Community if any additional information is needed regarding your question. The Ring Community is our first peer-to-peer community forum, giving our customers the ability to help one another by sharing their feedback and experiences with each other. All the best, Nicole from Ring.
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| Detector Type | Contact | Contact | Contact | Motion |
|---|---|---|---|---|
| Sensor Type | Magnetic | Magnetic | Magnetic | Magnetic |
| Wireless Connectivity | Z-Wave | Z-Wave | Z-Wave | None |
