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Product guide

eufy Security Entry Sensor AK-T89003D3

The eufy Security Entry Sensor AK-T89003D3 detects when a door or window opens and can send smartphone alerts through a required eufy HomeBase. It is an indoor contact sensor, so it suits buyers already using a compatible HomeBase rather than anyone seeking a standalone alarm.

At a glance

Alerts a smartphone when an opening is detected, and can trigger a 100-decibel siren on HomeBase.
Designed for indoor doors and windows. The sensor and magnet need to be fitted close together.
Installation is described as adhesive mounting or screw fixing.
A HomeBase is required. The listing names HomeBase S280 or HomeBase S380.

Price

£13.99Save 30%

Reference price: ~~£19.99~~

Price checked: 12 Nov 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

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£16.99

eufy Security Siren, 105 dB Wireless Alarm, IP65 Weatherproof | Remote Alerts, 2-Year Battery Life, HomeBase Required, Compatible with HomeBase S380 and S280, App Control, Easy to Install

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Pros and cons

Pros

Provides door and window status alerts on a smartphone through the eufy system.
The listed installation methods include adhesive tape, avoiding drilling when tape is suitable.
Customer feedback reports easy setup and integration with HomeBase.

Cons

It cannot operate as a standalone sensor because a eufy HomeBase is required.
Indoor use only limits placement where the sensor may be exposed to weather.

Technical specifications

14 specifications

Identity
Brand	eufy Security
Model	AK-T89003D3
Sensor technology	Contact Sensor

Connectivity and controls
Control method	App
Compatible device	Smartphone

Power and battery
Power configuration	Battery Powered
Battery description	Lithium
Battery count and inclusion	1 AAA batteries required. (included)

Dimensions and installation
Mounting type	Door Mount
Dimensions	7.4L x 2.8W x 2.2H centimetres
Weight	0.15 Pounds
Colour	White

Other listed details
Sound level	100 Decibels
Spare part availability duration	2 Years

What to know before buying

Listing details to confirm

The listing gives inconsistent battery information: it claims 800 days or 730 days of operation and names an included CR123A battery, while the details specify one included AAA battery and describe it as lithium. Confirm the battery type and expected life for the selected listing before purchase. The listing also describes the sensor as requiring HomeBase generally and specifically names S280 or S380. Its included-components field lists only the sensor, while the feature text claims a CR123A battery, magnet, three mounting screws and a manual. Confirm compatibility and package contents. The stated 100-decibel siren is triggered on HomeBase, not the sensor itself.

What’s in the box

Entry sensorIncluded
CR123A batteryCheck selected pack
MagnetCheck selected pack
3 mounting screwsCheck selected pack
Owner's manualCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Existing eufy HomeBase owners who want door or window opening alerts in the app.
Indoor monitoring where a contact sensor can be positioned near its matching magnet.

Less suited to

Buyers without a compatible eufy HomeBase.
Outdoor installations or anyone wanting an independent siren in the sensor itself.

eufy Security Entry Sensor AK-T89003D3 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 2,914 ratings

5 stars78%78%
4 stars14%14%
3 stars4%4%
2 stars1%1%
1 star3%3%

Customer feedback highlights straightforward installation, HomeBase connection, battery longevity and door-opening notifications. Some buyers report that the adhesive holds well, while others say it does not stick properly. This is relevant if you plan to mount without screws, and the reported HomeBase integration aligns with the listing's required hub. Ratings are mostly five-star, but they do not establish performance in every installation.

Positive themes

Customers report easy installation and connection to HomeBase.
Feedback mentions useful opening notifications and positive battery-life experiences.

Mixed feedback

Adhesion receives mixed feedback, with some customers praising the hold and others reporting that it does not stick properly.

Frequently asked questions

Does this sensor work without a HomeBase?

No. The listing says it requires eufy Security HomeBase. It names HomeBase S280 or HomeBase S380, so check that your system is compatible.

Can it be used outdoors?

No. The listing specifies indoor use only and says the sensor is not weatherproof.

What happens when a door or window is opened?

The listing says it can send a smartphone alert and trigger a 100-decibel siren on HomeBase when forced entry is detected. The siren feature is described as configurable.

Which battery and accessories are included?

The listing conflicts: the details specify one included AAA battery, but the feature text says CR123A and also claims a magnet, three screws and a manual. Confirm the selected package and battery type before buying.