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eufy Security

eufy Security Entry Sensor, Detects Opened and Closed Doors or Windows

  • Based on 2,012 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Oct 16
Order within 10 hours and 14 minutes
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Style: Entry Sensor


Features

  • 2-year Battery Life: One battery provides 800 days of monitoring.
  • For Doors And Windows: Compact and versatile design fits onto any door or window frame. Requires eufy Security HomeBase.
  • 100-decibel Siren: Enable or disable siren protection, which triggers a 100-decibel siren on HomeBase, and sends an alert to your smartphone when forced entry is detected.
  • Optional 24/7 Protection Service: New optional 24/7 professional monitoring service is now available for 24/7 emergency police, fire and medical response when your alarm system is triggered.
  • What's Included: Entry Sensor, CR123A Battery, Magnet, 3 x Mounting Screws, Owner's Manual.

Description

eufy Motion Sensor Alarm System 7-Piece Kit eufy Motion Sensor E20 eufy Entry Sensor E20 Glass Break Sensor E10 Flood & Freeze Sensor E20 eufy Entry Sensor At eufy we believe all great smart home products need to be thoughtfully built from the start. From whole-home security to smart cleaning solutions, eufy's technology brings you expert protection and deep cleaning that's tailored to your lifestyle and creates human-first technology that enlivens the lives of everyone around you. Because care is what makes a house a home, everything we build is built with care for you. eufy, Built with Care

Color: white


Brand: eufy Security


Power Source: Battery Powered


Compatible Devices: Smartphone


Product Dimensions: 1.1"L x 0.87"W x 2.91"H


Power Source: Battery Powered


Compatible Devices: Smartphone


Battery Description: Lithium


Number of Batteries: 1 Lithium Ion batteries required. (included)


Control Method: App


Audible Noise: 100 db


Mounting Type: Door Mount, Window Mount


Sensor Technology: Contact Sensor


Wattage: 7.5 watts


Color: white


Item Dimensions L x W x H: 1.1"L x 0.87"W x 2.91"H


EU Spare Part Availability Duration: 2 years


Item Highlight: Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use Only, Requires HomeBase


Brand: eufy Security


UPC: 848061058666


Number of Packs: 1


Item Weight: 2.4 ounces


Global Trade Identification Number: 66


Unit Count: 1 Count


Size: 1 Count (Pack of 1)


Manufacturer: eufy Security


Manufacturer Warranty Description: 12-month warranty and provide friendly, easy-to-reach support.


Number of Items: 1


Built-In Media: Entry Sensor, CR123A Battery, Magnet, 3 x Mounting Screws, Owner's Manual, Happy Card.


Model Number: T8900


Mfr Part Number: AK-


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • A Thumbs Up!
Style: Entry Sensor
This is the second unit that I have bought. The first was about 4 years ago probably when eufy first brought it out. I was pleased with it then and am still. The device has proven to be completely reliable. I decided to alarm the my outside garage door which is used by service personnel on a regular basis. Mounting the two pieces was easy using the applied sticky pads. The sensor/transmitter per the instructions can be attached with screws. The two pieces can be installed on any standard and patio doors. The audio alert can be heard throughout my house as the volume and signal can be set in the app. The eufy home base and app allows me to receive notices on my phone when away. The sensor/transmitter uses a not so common battery that is said to last 8 months. I've changed the battery in my original unit once in 4 years. I've installed another manufacturer's door and window sensors in another house. The unit is much smaller and uses 2032 batteries that in my experience don't seem to last as long as the eufy battery. On a door the eufy size is not a problem. I can recommend it as I just bought my third unit. ... show more
Reviewed in the United States on September 3, 2025 by Jan
    • Eufy ecosystem works well
Style: Entry Sensor
The Eufy ecosystem is very good, I’ve had it for five years now. Just needed more entry sensors which was easy to synchronize or connect to the WiFi and the system and it works well. The adhesive is good, it sticks properly to the surface of my window really good. I would recommend the entire Eufy ecosystem if you want a reliable security system for your home. Remember you can set up the entire system yourself. It’s that easy. ... show more
Reviewed in the United States on December 18, 2025 by Randy E
    • Good sensors
Style: Entry Sensor
I purchased a couple of these entry sensors in addition to the Eufy Security 5-Piece Home Alarm Kit, which is equipped with just two sensors. The delivery was promptly and well-packed. These were installed following the installation of the 5-piece kit. Once, installed and synchronized with the home base, they were added to the controller app, they have been working perfectly thus far. The only negative that I can see with these sensors are the magnet housing, where on some porous surface like an unpainted door frame, the sticky pad in the back was not strong enough against the magnetic tendency to pull it toward the sensor, so I tried to keep it in place with the provided screw; however, that did not worked-out satisfactory b/c the plastic base of the housing was not sturdy, the plastic housing is a little flimsy, and the screw head is tiny. So, to fix it, I had to fabricate a little bracket to hold the magnet assembly in place. Recommendation to Eufy: improve the magnet housing assembly by making it a little wider and sturdier along with a larger screw that is capable of holding it down securely. ... show more
Reviewed in the United States on November 28, 2023 by Thosoc
    • Quality
Style: Entry Sensor
Good Quality Best Price
Reviewed in the United States on July 6, 2026 by Tommy
    • As advertise. It works gives an alert when the door or windows open or closing
Style: Entry Sensor
Works as it should
Reviewed in the United States on May 16, 2026 by Amazon Customer
    • Unimpressed at first. But stay tuned!
Style: Entry Sensor
Lots of potential. Hardware is very well designed. Software feels like it’s still under development. We’ve recently purchased many eufy security products. These sensors pair easily to my eufy homebase 2 and read the door’s open-close status reliability. However, Because of the software, they seem pretty useless. Right now, I can “arm” my eufy security system and an alarm will sound when the door is opened. That’s good. But the app requires many taps to arm/disarm the system and there’s currently no integration with other systems like HomeKit or August. I expect one big button to arm/disarm all my smart home security devices. Adding integrations to arm/disarm the system or Siri Shortcuts would be a big improvement! Additionally, the sensor has no chime feature with the homebase making it useless unless the system is “Armed”. It would be very useful to hear a pleasant chime from the homebase or the eufy video doorbell chime when my young kids open the door unsupervised. Ultimately, it’s a neat add-on to my eufy cameras, but features seem a bit raw or missing. I’m hopeful eufy will continue development. Update: Anker emailed me about my review and apologized for the experience. As part of the apology they sent a cool little battery bank. I’m glad they care and are paying attention. I hope this means they’re adding my requested software changes. Unfortunately for Anker, my review doesn’t change until they change how this product integrates with the rest of the system. More updates: Anker/eufy has continued to pursue total satisfaction. I must say I’m impressed. If they’re product development work’s nearly as hard as their customer service, they’ll be adding my requested changes in no time. Along with this update I must mention an announcement by eufy at CES 2020. Eufy is releasing a new keypad with home/away buttons thereby satisfying one of my major complaints with this system as an alarm. I am increasing my rating from 3 stars to 5 stars out of optimism for future updates as well as outstanding customer service. Update 7/8/2020 The requested door chime feature has been added. Now a pleasant chime is made by the hombase2 when a door is opened. They still lack in integration even among their own products. If I arm the alarm system, (camera, motion, and door sensors paired to the homebase2) other devices like the floodlight cam outside are unaffected and do not switch into an “away” mode without additional action in the app. ... show more
Reviewed in the United States on December 8, 2019 by N. Hurn
    • Great Door Chime!
Style: Entry Sensor
Review Image by Rubark Est. 2014
I bought 3 of these after our home was robbed. They work great and communicate very well with the home base unit, very responsive. As soon as a door opens, you’ll hear the chime. One thing to note is that the little unit is magnetic in addition to having 3M tape, so if your doors aren’t magnetic, you will need to stick it on. The large unit must be stuck on with 3M tape only. You can see what I mean in the video. Great product! 5/5. ... show more
Reviewed in the United States on July 16, 2025 by Rubark Est. 2014
    • Ok
Style: Entry Sensor
Ok
Reviewed in the United States on August 21, 2026 by Heidy Fernandez

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