10 Best Door And Window Alarm Sensors in The UK

Last updated on 02/08/2025

Advertising disclosure

Best Choice

9.9

Exceptional

Ring

Ring Alarm Contact Sensor (2nd Generation) - 2 pack

Free Shipping

Why We Love It

Real-time notifications on openings.
Compact, space-efficient design.
Hassle-free tool-free installation.

Main Highlights

Get real-time notifications the moment a door or window opens in your home.
Now with a more compact design and slim removable magnets for easy installation, even when space is limited.
Easy, tool-free installation.
Mounts to doors and window frames.
4 x CR2032 Lithium Coin Cell 3V.
Requires Ring Alarm Base Station. Compatible with 1st and 2nd generation Ring Alarm devices and accessories.
Alexa can notify you when your Ring Alarm Contact Sensors and Motion Detectors are running low on batteries.

Yale AC-DC Sync Alarm Door/Window Contact - Sync Smart Home Alarm - 200m range

Free Shipping

Why We Love It

Effortless setup and installation.
Real-time security alert feature.
Unparalleled smart home compatibility.

Main Highlights

SYNC ALARM ACCESSORY: The Door/Window Contact is easy to pair with your Yale Sync Smart Home Alarm through the Yale Alarm App.
TAMPER PROOF SECURITY: Secures any door or window, the main access points to your home, triggering your alarm & notifying you in real-time when a door or window is opened.
INSTANT NOTIFICATIONS: Get notifications to your Yale Alarm app if a contact is disturbed in your home while the alarm is armed.
EASY TO SET UP & INSTALL: Link to your Yale Sync Smart Home Alarm straight out of the box. Completely wire-free, with no need for cables running through your home. You can attach to any surface, either via a screw or sticky-back for greater convenience.
EXPANDABLE SYSTEM: Extend & customise your Yale Sync Alarm, by adding up to 40 accessories.

Ring Alarm Contact Sensor (2nd Generation)

5% OffFree Shipping

Why We Love It

Compact and easy installation.
Real-time door/window notifications.
Alexa battery notifications available.

Main Highlights

Get real-time notifications the moment a door or window opens in your home.
Now with a more compact design and a slim removable magnet for easy installation, even when space is limited.
Easy, tool-free installation.
Mounts to doors and window frames.
2 x CR2032 Lithium Coin Cell 3V.
Requires Ring Alarm Base Station. Compatible with 1st and 2nd generation Ring Alarm devices and accessories.
Alexa can notify you when your Ring Alarm Contact Sensors and Motion Detectors are running low on batteries.

Yale EF-DC Easy Fit Alarm Door/Window Contact, White, Accessory for SR & EF Alarms, for main access points

Free Shipping

Why We Love It

Lightweight and compact design.
Ideal for pet owners.
Comes with necessary fixings.

Main Highlights

Lightweight, compact and slim
For main access points around the home
Activates the alarm when door/window is opened and this device is not compatible with the Sync & HSA Range of Alarm
Ideal for homes with pets
Supplied with fixings and battery

3 Pack Door Alarms with Delay When Left Open 130db Window Break Sliding Siren Vibration Detect Sensor for Home, Apartment Security. Keypad Intruder Burglar Entry Alert. Pool Alarm for Kids Safety

Free Shipping

Why We Love It

Easy installation without tools.
User-friendly for all family.
Adjustable sounds for safety.

Main Highlights

FIRST PLEASE CONFIRM IF YOUR DOOR OR WINDOW IS SUITABLE FOR INSTALLING THIS ALARM? ① Check and measure whether there is a sufficiently flat surface: Require area size 2.6 x 1.9″ on the door panel or window for mounting the alarm; Require area size 0.6 x 1.8″ on the door frame or window edge for mounting the sensor strip; ② The installed alarm and sensor strip should be basically on the same horizontal plane (a small amount of vertical misalignment is allowed), with a maximum gap of no more than 0.78 inch/2cm between them. Otherwise, the alarm may not function properly.
HOW TO ARM AND DISARM? Press Button '4' when you leave. You'll have a 30-second delay to close the door and exit without triggering the alarm. When the door opens, enter your PIN CODE within the first 5 seconds (adjustable to 10 or 15 seconds if needed) to disarm the alarm. If you don't disarm it in time, it will sound for 30 seconds.
KYEPAD DOOR WINDOW ALARM: Button-operated for quick and easy use, eliminating the need for a remote control. This makes it convenient for other family members(Elderly or Children) to use and avoids the hassle of carrying multiple remotes when going out.
HOW THIS ALARM WILL BE TRIGGERED？While door/window is opened(When the alarm and sensor strip are separated more than 0.78''/20mm) or vibration is detected, e.g window glasses break, shatter or a door being forcibly hit.
SOUND SELECTABLE & VOLUME ADJUSTABLE: ALARM SOUND (default) is high-pitched, harsh sound, aiming to promptly deter potential intruder, burglar; CHIME SOUND is soft bell sound which can set it as Kids Safety Pool Alarm which won't scare kids but can alert you when your child opens a door and enters a restricted area where they are not allowed. VOLUME ADJUSTABLE: "H"-130db(Default ) or "L", chose according to your needs.
Cordless operated by user-replaceable battery cell LR44 x 3 pcs(included). Apply the double sided adhesive pad(included)to the back of the main alarm unit and sensor strip. Locate the mounting position on the door or window. Please follow the manual guidance

TECKNET Door Alarm Sensor, Window Alarms Sensors, 2-in-1 Alarm & Chime, 3-level Volume Control, Door Sensor for Home Security, Wireless Burglar Alarms for House, Shop, Office, Garage (3 PCS)

Free Shipping

Why We Love It

Quick and responsive alarm modes.
Versatile 3-level volume control.
Simple and firm installation.

Main Highlights

Quick Alarm & 3 Modes: The "Alarm" mode will immediately activate a continuous and super strong siren when the sensor and the alarm are separated by more than 2 cm until they are back together. In "Chime" mode, the door alarm will emit a brief audible alarm, serving as a gentle reminder. If you prefer silence, simply switch to the "Off" mode.
3-level volume control: The door alarms for your home can also be used as window alarms for security, pool alarms, shed alarms, garage alarms, or sliding door alarms. TECKNET door sensors with 3-level volume control are the perfect solution for apartments, mobile homes, offices, hotels, stores, and more.
Easy to Install: Just use the attached stickers to gently install the burglar alarm on various parts of the house, such as doors, windows, cabinets, drawers, gates, etc.! (Note: Keep the installation area clean and ensure that the sensor is installed within 2 cm from the arrow side of the alarm.)
Mini and Portable: With its mini design, this wireless ring alarm won't take up any extra space. You can easily carry it in any backpack when you go out. (If the alarm isn't working, check if it's in OFF mode or if the batteries need replacing.)
36 Months Warranty: If you encounter any problems in using the product, please feel free to contact our professional customer service team, enjoying TECKNET 36 Months Warranty (Registered Only)

Tapo T110 Smart Door Alarm, Window Door Alarm Sensor with Real-Time Monitoring, Instant Push Notifications, Create a Smart Home Automation, Battery Included, Works with Tapo Devices Alexa Google Home

13% OffFree Shipping

Why We Love It

Real-time monitoring and alerts.
Smart home automation enabled.
Easy installation and setup.

Main Highlights

Window/ Door Safeguard – Monitor the opening and closing of windows, doors, cabinets, the fridge, or the mailbox in real time; perfect as a window alarm ; door alarm ; shed
Real-Time Notifications – Trigger Hub alarm (Tapo Hub required and purchased seperately to activate smart alarm) and send you notifications via Tapo app whenever doors/windows are open; Tapo door sensor alarm improve your home security
Smart Actions Support – Connect the actions with other smart devices whenever doors/windows are open for security or home automation
Battery Powered – Battery-powered design with 1+ year battery life; Tapo smart contact sensor is a perfect solution to your home alarm systems
Easy Installation and setup – Mount to nearly any surface with included 3M adhesive, Set up quickly and easily through the free Tapo app
This device operates exclusively within the specified Sub-1G band; Please note that different regions support different frequency bands; Ensure that the devices or hubs you intend to use are compatible with the same Sub-1G band

Personal Security Window & Door Alarm Bell | Wireless Sensor Door Window Burglar Alarm | Pack of 10

Free Shipping

Why We Love It

High quality and durable.
Super loud alarm.
Easy to install.

Main Highlights

100% New and high quality. Type to window or door. Ideal entry warning for homes, apartments, mobile homes, offices, hotel rooms,garages and more.
Super loud 95 dB alarm. When someone opens the door or window illegally (the relative position of the primary and secondary parts changes), the alarm can issue a strong alarm, warning the intruder to leave and remind the owner.
This magnetic sensor can detect the status of your door or window. It can prevent your children from sneaking out and ensure the safety of children, homes, garages, mailboxes and businesses.
You can easily install and operate. Press the on/off switch to turn on/off the power, then insert 2pcs AAA batteries (No battery in the box). Tear off the self-adhesive pad on the back of the door alarm sensor, and stick the door handle alarm to the target location.
Super environmental suitability and stability. Package Included: 10 x Magnetic Sensor; 10 x Magnetic Stick.

Fixget Pack of 8 Magnetic Door and Window Security Entry Alarm System WirelessMini Alarms Burglar Intruder Entry Warning Sensors White (Battery Included)

Free Shipping

Why We Love It

Compact with loud alert.
Simple and quick installation.
Includes necessary batteries.

Main Highlights

Dimensions: 2.5 x 1.3 x 0.8 inch with 90 dB(A) loud
Easy Installation: Easily mounted by adhesive tape to Window or door
Operation: Operated by 3pcs 1.5VLR44 button cell (batteries included in package)
Working Principle: Magnetic sensor switch detects entry protecting your home or office whether you are in or out
Wide Application: Ideal entry warning for home, office, hotel, apartments, garages use(Only deliver to UK region)

TECKNET Door Alarm Sensor 2 Packs With Remote Control, Window Alarms for Security, 4 Modes, Adjustable Volume, Wireless Magnetic Door Sensor Burglar Alarm Systems for Your Home Security Systems

20% OffFree Shipping

Why We Love It

Instant loud alarm for safety.
Versatile modes for custom alerts.
Easy installation and setup process.

Main Highlights

Instant Loud Alarm: When the door alarm and sensor are separated by more than 1.5CM, a powerful 100dB alarm instantly sounds, deterring children from sneaking out or alerting you to intruders. Pressing the SOS button triggers a continuous alarm, boosting security for homes, offices, shops, and garages.
Versatile Modes: The door sensor alarm offers 4 modes: "SOS mode" (continuous alarm until disarmed), "Chime mode" (a "ding-dong" sound when opened), "Alarm mode 1" (alarm sounds upon opening and stops when closed), and "Alarm mode 2" (a 30-second alarm that continues even if the door/window is immediately closed). Adjust the volume easily using the volume button.
Remote Security Control: The door alarms for your home include 2 wireless remote controls with a 50-meter range, allowing you to turn the alarm on/off or switch modes from a distance. In case of emergencies, such as an elderly person or child falling near your home or encountering danger, pressing the SOS button will trigger an immediate alarm for quick assistance.
Simple Installation: The compact magnetic window alarms are easy to install in various locations using the provided stickers. (Note: Clean the installation area and place the sensor within 1.5cm of the alarm's arrow side.) The door sensor alarm requires 2 AAA batteries (not included), with an LED flashing every 3 seconds to indicate low battery.
36 Months Warranty: If the wireless alarm system isn’t working, check the battery and ensure it’s armed. If you encounter any problems in using the door alarm sensor, please feel free to contact our professional customer service team, enjoying TECKNET 36 Months Warranty (Registered Only).

9.2

Superb

Save 20%

We scanned 199 products

We reviewed these offers relevant to the Door And Window Alarm Sensors within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Ring, Yale, Mosaic Alarm, TECKNET, Tapo, NICE Home, Fixget, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Door And Window Alarm Sensors in the market, we considered we took a deep dive into 996 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Ring Alarm Contact Sensor (2nd Generation) - 2 pack. We love many things about this product by Ring. What sets it apart from the competition is Real-time notifications on openings, Compact, space-efficient design, Hassle-free tool-free installation.
The best value product for most shoppers and where user satisfaction is continuously the highest is Yale AC-DC Sync Alarm Door/Window Contact - Sync Smart Home Alarm - 200m range by Yale based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Door And Window Alarm Sensors and the best cost-to-value ratio is TECKNET Door Alarm Sensor 2 Packs With Remote Control, Window Alarms for Security, 4 Modes, Adjustable Volume, Wireless Magnetic Door Sensor Burglar Alarm Systems for Your Home Security Systemsat TECKNET with a 20% discount.
Our list of the best Door And Window Alarm Sensors is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Door And Window Alarm Sensors in The UK

Related Deals You Might Like for Door And Window Alarm Sensors

2 Pack of Burglar Alarm Door/Window Contact Detectors - Wired - White - Professional Quality

VOXON Wireless Door and Window Alarm Sensor 2 Pack 2 Modes Magnetic Window Door Burglar Alarm with 100dB Loud for Kids Safety Home Shop Security

Door Window Alarm 2 Pack Noopel Home Security Ultra-Slim Wireless Magnetic Sensor Burglar Anti-theft 120DB Alarm with Batteries included - DIY EASY to Install

4 Pack Home Security Alarms - Window & Door Alarm Sensors for Kids Safety, Burglar Bell Alarm for Home & Office

TechRise Door Window Alarm Sensor, 2-in-1 Alarm & Chime, Mini Door Sensor for Home Security, 3-level Volume Control, Shed Door Sensor for Child Security, House Shop Safety, 3 PCS

Door & Window Alarm for Enhanced Home Security - 120dB Loud Siren, Easy to Install, Battery Included - Protect Your Family & Property With This Intruder Alert System for Doors, Windows, Sheds, etc

2 Pack Door Window Alarm Sensor Home Security Ultra-Slim Wireless Magnetic Burglar Alarm with 125DB Loud Intruder Entry Batteries Included for Home Office Apartment Garage Safety Easy to Install

Yale B-HSA6010 Alarm Accessory Door/Window Contact, White, 15.2 x 8.8 x 3 cm

SANJIE Wireless Door Open Alarm Sensor Chime, 800FT Operating Range 55 Ringtones 5 Volume Level with LED Indicator,Door Alarm for Home Store Office Security When Opens,1 UK Plug in Receiver 1 Sensor

Defender Ultra Slim Vibration Alarm 2 Pack - Window Alert Alarm Sensor Smash Glass Siren 130dB - Police Accredited

We scanned 199 products

We concluded that: