Updated November 2026
Data from the official Eufy site.
2026 verdict
This is the same Entry Sensor one generation later, and the Eufy Entry Sensor E20 is the one to buy.
It pairs with the same HomeBase family, lasts up to five years on a single CR123A against roughly two for the Eufy Entry Sensor, adds tamper protection and dual-side magnet placement, and is the lower priced of the two. Both are indoor contact sensors with no Alexa, Google Home, Apple HomeKit or Matter support, reaching Home Assistant only through a community integration. Choose the Eufy Entry Sensor E20 to extend a eufy system with the longer battery and the extra features, and the Eufy Entry Sensor only if you are matching units in an existing older installation.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
20% OFF
$23.99
$29.99
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Eufy Entry Sensor | Eufy Entry Sensor E20 | Winner |
|---|---|---|---|
| Price | $29.99 | $23.99 | Eufy Entry Sensor E20 |
| Battery Life | 2 years | 5 years | Eufy Entry Sensor E20 |
| Alerts | Door & Window Open/Close Alerts | Door & Window Open/Close Alerts, Tamper Alerts | Eufy Entry Sensor E20 |
| Rating | 4.5 | 4.5 | Tie |
| Warranty | 1 year | 1 year | Tie |
| Weather Resistance | NO | NO | Tie |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| Sensors | Door & Window Open/Close | Door & Window Open/Close | Tie |
What the differences mean
Battery life
The Eufy Entry Sensor E20 is rated for up to five years on a single CR123A, where the Eufy Entry Sensor is rated around two. Over the life of a home the newer sensor means noticeably fewer battery swaps on doors and windows you open every day.
Tamper protection
The Eufy Entry Sensor E20 lists tamper protection, so it can report being interfered with. The Eufy Entry Sensor does not, so a sensor that is knocked or removed only stops reporting rather than raising a tamper event.
Magnet placement
The Eufy Entry Sensor E20 has dual-side detection: its magnet can sit on the left or right of the main unit within about 2 cm, so installation does not depend on which side of a frame you mount it. The Eufy Entry Sensor needs its two halves within roughly 4 cm and offers no such choice.
Bypass button
The Eufy Entry Sensor E20 adds a bypass button that temporarily disarms the sensor so you can open a door without tripping the alarm while the rest of the system stays armed. The Eufy Entry Sensor has no bypass button, so that convenience comes from the app instead.
Which one to buy if
- you want to go years without changing a battery
The Eufy Entry Sensor E20 is rated for up to five years on one CR123A, against about two for the Eufy Entry Sensor.
- you want a tamper alert if someone interferes with the sensor
The Eufy Entry Sensor E20 supports tamper protection, which the Eufy Entry Sensor does not list.
- the frame makes you mount the magnet on an awkward side
The Eufy Entry Sensor E20 accepts its magnet on either side within about 2 cm, so the two halves fit either way.
- you are expanding an installation that already uses the older sensor
The Eufy Entry Sensor keeps an existing eufy setup uniform on the same HomeBase, if you prefer matching units.
$29.99
- - Price: $29.99 vs $23.99
- - Battery Life: 2 years vs 5 years
Winner
20% OFF
$23.99
$29.99
- + Price: $23.99
- + Battery Life: 5 years
- + Alerts: Door & Window Open/Close Alerts, Tamper Alerts
What owners say
Owners of both eufy sensors describe the same core experience: a contact sensor that pairs with a eufy HomeBase, sends open and close alerts quickly, and triggers the base siren, camera recordings and a chime with no monthly fee. Eufy Entry Sensor owners single out reliability over years of use, battery life that outlasts smaller coin-cell rivals, and an app with home, away and night modes; they complain that it is larger than some competitors, uses a less common battery, and has a flimsy magnet housing. Eufy Entry Sensor E20 owners praise the five-year battery, the dual-side magnet that avoids flipping the halves, and offline range, and note that it still depends entirely on a HomeBase.
Upgrading from the Eufy Entry Sensor?
Moving from the Eufy Entry Sensor to the Eufy Entry Sensor E20 buys a longer battery and a set of small conveniences. The newer sensor pairs to the same HomeBase family and delivers the same open and close alerts, chime and siren triggering, and no monthly fee, but its CR123A is rated for up to five years instead of about two, and it adds tamper protection, dual-side magnet placement and a bypass button. If your original sensors still have years of battery left and you have no use for the extras, there is little to gain; if you are fitting new doors or tired of battery changes, the E20 is the better unit to buy.
Frequently Asked Questions
Which is better overall: Eufy Entry Sensor or Eufy Entry Sensor E20?
The Eufy Entry Sensor E20 is the better sensor, with up to five years on one battery against about two, plus tamper protection, dual-side magnet placement and a bypass button, and it is the lower priced of the two. The Eufy Entry Sensor only makes sense if you are matching existing older units in one installation.
What is the biggest difference between the Eufy Entry Sensor and the Eufy Entry Sensor E20?
Battery life is the headline: the Eufy Entry Sensor E20 is rated for up to five years on a single CR123A, while the Eufy Entry Sensor is rated for around two. The E20 also adds tamper protection, dual-side magnet detection and a bypass button.
Do both eufy sensors need a HomeBase?
Yes. Both the Eufy Entry Sensor and the Eufy Entry Sensor E20 are HomeBase accessories rather than standalone sensors. The Eufy Entry Sensor E20 works with the HomeBase Mini, 2, 3 and Pro, and the HomeBase provides the link to the eufy app.
Do these eufy sensors work with Alexa, Google Home or HomeKit?
No. Neither the Eufy Entry Sensor nor the Eufy Entry Sensor E20 supports Alexa, Google Home, Apple HomeKit or Matter, and both reach Home Assistant only through a community integration. They run inside the eufy app with a HomeBase.
Who should buy the Eufy Entry Sensor?
Owners of an existing eufy HomeBase system who want to add a proven sensor and keep their installation uniform, and who do not need the longer battery or tamper protection of the newer model.
Who should buy the Eufy Entry Sensor E20?
Anyone extending a eufy HomeBase system who wants the longest battery, tamper protection and dual-side magnet placement, and who wants the lower priced of the two sensors.
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