eufy Entry Sensor E20 Door Contact Sensor

The eufy Security Entry Sensor E20 is a door and window contact sensor for a compatible eufy HomeBase. Its left-or-right installation and temporary bypass button suit entry points where access is sometimes needed while the alarm is armed.

At a glance

Supports installation with the magnet on either the left or right side of the main unit.
A bypass button temporarily disarms the sensor. The listing says bypass lasts 120 seconds.
Requires a compatible HomeBase, with minimum software versions specified for supported models.
The stated communication range of 200 m is based on open-field testing.

Price

€24.90Save 29%

Reference price: ~~€34.99~~

Price checked: 13 Nov 2026

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Pros and cons

Pros

Left- or right-side magnet placement gives more flexibility when fitting the sensor to a door or window.
The temporary bypass function is useful when opening a protected door without triggering an alarm, while other sensors remain active.
The listing describes app alerts, HomeBase chimes and automation options with the required equipment and app version.

Technical specifications

5 specifications

Identity
Brand	eufy Security
Model	Entry Sensor E20
Sensor technology	contact

Connectivity and controls
Control methods listed	App, Push Button

Installation
Mounting type listed	Door Mount

What to know before buying

Requires a compatible HomeBase: Mini from v4.0.5.2, HomeBase 2 from v3.4.1.2 and released after 2021, HomeBase 3 from v3.7.2.6, or HomeBase Pro from v4.1.4.3. The listing also says to use the EU version of HomeBase. The claimed 200 m range is open-field only, and the stated five-year battery life is based on internal testing and may vary with use. The bypass is described as lasting 120 seconds. Advanced alerts and automation require eufy app v6.0.00 or above.

Who is it for?

A good fit for

eufy HomeBase owners adding contact detection to a door or window.
Households that sometimes need to open an armed entry point using a temporary bypass.

Less suited to

Buyers without a compatible, sufficiently updated HomeBase.
Buyers seeking a standalone sensor or a stated in-building range guarantee.

eufy Entry Sensor E20 Door Contact Sensor · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 84 ratings

5 stars81%81%
4 stars12%12%
3 stars3%3%
2 stars2%2%
1 star2%2%

Customer feedback describes the sensor as reliable, good in quality and easy to set up, while connectivity receives mixed feedback. Those reports may matter for a HomeBase-based entry setup, particularly where dependable communication is important. The listing requires a compatible, updated HomeBase, and its 200 m range claim applies to open-field conditions rather than guaranteeing range inside a home.

Positive themes

Customers report reliable detection of door and window openings.
Feedback describes the product quality positively.
Customers report that setup is easy.

Mixed feedback

Connectivity feedback is mixed.

Frequently asked questions

Does the eufy Entry Sensor E20 work without a HomeBase?

No. The listing says it must connect to a compatible HomeBase with the required software version.

Which HomeBase models are listed as compatible?

HomeBase Mini, HomeBase 2, HomeBase 3 and HomeBase Pro are listed, each with a minimum software version. The listing specifies the EU version of HomeBase.

What does dual-side detection mean?

The magnet can be placed to the left or right of the main sensor unit. The listing gives a detection distance of 0.8 inch / 2 cm.

How does the bypass button work?

The listing says to press it for 2 seconds to temporarily disarm the sensor. Bypass lasts 120 seconds, after which the sensor returns to normal.

What range and battery life are claimed?

The stated HomeBase communication range is up to 200 m in open-field conditions. Battery life is claimed as five years under normal conditions based on internal lab testing, and actual performance may vary.