# 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.

- [Original product page](https://bargainpostbox.co.uk/product/eufy-security-entry-sensor-ak-t89003d3)
- [View offer](https://bargainpostbox.co.uk/visit/eufy-security-entry-sensor-ak-t89003d3)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: eufy Security
- Model: AK-T89003D3
- Category: Electronics > Smart Home & Security > Alarms & Sensors
- Price: 13.99 GBP
- Previous price: 19.99 GBP
- Discount: 30%
- Price checked: 2026-11-12T17:39:38.224Z
- Rating: 4.6 / 5
- Reviews: 2914

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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

## Before you buy

- 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.

## In the box

- Entry sensor (Included)
- CR123A battery (Check selected pack): Feature text claims inclusion, but the product details specify one included AAA battery.
- Magnet (Check selected pack): Listed in the feature text, not the included-components field.
- 3 mounting screws (Check selected pack): Listed in the feature text, not the included-components field.
- Owner's manual (Check selected pack): Listed in the feature text, not the included-components field.

## 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.

## Customer feedback

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.
- Positive themes: 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.

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## Images

![eufy Security Entry Sensor AK-T89003D3 — 1](https://bargainpostbox.co.uk/i/0ApZIPDaE67v7GkCTe1MuBHtCIk7eL3E43MfZ0Gref3YlxyoOz2cB3zDcKJYDEh39bk_bmvbKfkyt1N8in0IaQCn58ooxhmI3t-iTGDC1L7sYY60hEubPA8H.jpg)

![eufy Security Entry Sensor AK-T89003D3 — 2](https://bargainpostbox.co.uk/i/q_v2B5R_vV0KdxKHAg9ZCckk9DiQQ3_ZFP0PQhN5N5PFnTqnnsTMARP1yeDup9IN8i3cMcY8Dds0kgvvCf2f59h3HM_kSBKweJs93k5MZGiHPuGAf_v-qJaq.jpg)

![eufy Security Entry Sensor AK-T89003D3 — 3](https://bargainpostbox.co.uk/i/OgM9XX_d3R_30PUmFBBy2dMS_r3gFXKj5ZLR08YvNfR8GvDlgsr3PNcGbfGaI8GUOdQCtBBM_qoRxURJ47NLcGZKza1_LDaiYkWY9S-OU2ikbtSGhGcFZpmt.jpg)

![eufy Security Entry Sensor AK-T89003D3 — 4](https://bargainpostbox.co.uk/i/UG8UOpR-kQmyD4a6AnuyA4Ky-WdFXHx0H80F5uPG3xQaKXcRZXy5MdK8JwI3kgi__CPC1W8rft1ppaYyy8w6A4MeiVJly4RvXKluH-RGod0sU7b0GMgISoym.jpg)

![eufy Security Entry Sensor AK-T89003D3 — 5](https://bargainpostbox.co.uk/i/am6XbkX2w3rP9Sep_lEIYzdSqrFdKItXyn3ztqDweBLSbyP9yQSiZcXQ5TlWes-FLRsHIgVslEi6kfI_M3iT3tBNSXvk2aDiGNsN3ZydNLF_J6h1wk-t58mR.jpg)

![eufy Security Entry Sensor AK-T89003D3 — 6](https://bargainpostbox.co.uk/i/6Fytv7Db0u7ChuhwYTivrox2ZjNpDyx4o-cO1BoknVLve2oC4YVbFdazhti1GqpDBRIfYvcNDxgrC43ul0NmNuwpKWjO-Q5DgTTMXZRiT3cdfl39-88ejCdo.jpg)

![eufy Security Entry Sensor AK-T89003D3 — 7](https://bargainpostbox.co.uk/i/yuSLPJ49aYSfWHZASSse09BNUjidETIWQjYjZSugC1owVSBYSkvq09iaB8gMvbI4bPiWCxb75kdZNomh6KO2YM91xUt-93LdbTWinsY9JAsSQRfEuY8rH9TE.jpg)