eufy Security Entry Sensor, Detects Opened and Closed Doors or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year…
Best for
Best overall
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 2 trusted sources
Current price
$29.99
Updated May 18, 2026 · 1 min read
Sources behind this verdict
12 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the eufy Entry Sensor lands as the most consistently praised contact sensor when paired with an existing eufy HomeBase. Best Buy's verified-purchase review summary highlights ease of install, reliable notifications, long battery life, and seamless HomeBase integration, and the Amazon listing's claimed 800-day battery life is echoed across retailer and community reports. Newegg's product page reiterates the same 2-year battery and 100 dB HomeBase siren behavior.
What reviewers liked
- Best Buy verified-purchase reviewers consistently cite reliable notifications and easy install
- Claimed ~2-year battery life on a single cell, echoed across retailer reviews
- Integrates with HomeBase siren for an actual audible alarm, not just app pings
- Strong Amazon volume (≈2,000 reviews at 4.6) corroborates retailer sentiment
Where it falls short
- Requires a eufy HomeBase, no value as a standalone sensor
- r/eufy_security users report occasional false-open states that needed a HomeBase reboot
- No native Matter/Thread support; locked into the eufy app ecosystem
- Indoor use only per the product listing, limits placement on exterior gates/sheds
Across the reviewers we read, the eufy Entry Sensor lands as the most consistently praised contact sensor when paired with an existing eufy HomeBase. Best Buy's verified-purchase review summary highlights ease of install, reliable notifications, long battery life, and seamless HomeBase integration, and the Amazon listing's claimed 800-day battery life is echoed across retailer and community reports. Newegg's product page reiterates the same 2-year battery and 100 dB HomeBase siren behavior.
Specialist communities are mostly positive but not uncritical. Threads on r/eufy_security and r/EufyCam describe occasional false "open" states that required a HomeBase restart, and several users note the sensor itself is a basic alert device, the loudness and "alarm" experience really comes from the HomeBase, not the sensor. A separate r/homeassistant thread is a useful reminder that if you're not already in the eufy ecosystem, Aqara is the community's reflexive recommendation.
The verdict that emerges is narrow but strong: if you already own (or are buying) a eufy HomeBase for cameras, the Entry Sensor is the path of least resistance and the reviewer consensus is overwhelmingly positive. Outside that ecosystem, its value drops sharply.
- 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.
Customers are impressed with the Smart Home Security Entry Sensor Add-on's ease of use and straightforward installation. The product is also praised for its quality, reliable notifications, and enhanced security features. Users appreciate the sensor's long battery life, compact size, and seamless compatibility with the…
Entry SensorProtect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. Once a window or door is ajar by 1.5 inch, an alert will be sent to your smartphone, and a 100-decibel siren will go off on the HomeBase (can be disabled). Requires…
I had some vague issues when it told me my garage door was open for more then 5min while is was closed 100%. After a restart of the homebase ...
I made the move from the HB2 to the HB3 and I use the door sensors and a motion sensor. My doorbell now even has proper privacy zones so I can ...
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“Which Eufy Door Sensor Should You Choose? Security vs Entry ...” · YouTube
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