Window Sensors

601 results

Reed Magnet Set Burglar Door Window Contact Alarm Switch Sensor N/O(Closed Loop)
Brand new
£2.49 to £4.15
Free postage
1,544 sold
Link2Home Wireless Door/window Sensor Secure Kit Up To 24 Month Battery Life
Brand new
£19.34
or Best Offer
£2.70 P&P
Link2Home Wireless Door/window Sensor Secure Kit Up To 24 Month Battery Life
Brand new
£21.48
or Best Offer
£2.94 P&P
Response Alarms Door Window Detector 433MHz SA Range INCLUDING GUIDE /RRP £39.95
Brand new · Friedland
(14)
£37.95
£3.79 P&P
Only 1 left.
New listingHive Active Home Door and Window Contact Sensor
Pre-owned · Hive
(28)
£9.17
£2.94 P&P
Hive Smart Sensor for Windows and Doors - White
Trusted Seller - Quick Dispatch - Fast Free Shipping
Brand new · Hive
(28)
£19.95
Free postage
Click & Collect
279 sold
Infrared Driveway Alarm,Yard,Farm, Garage/DoorAlarm,Single Beam,Remote Control.
Brand new
£105.00
Free postage
Click & Collect
62 watching
4 X WIRELESS DOOR WINDOW CARAVAN SHED MOTORHOME BOAT SECURITY SENSOR ALARMS 85DB
Brand new
£12.90
Free postage
Click & Collect
87 sold
2x Defender Door Handle Alarm (with Batteries)
Brand new · Defender
(46)
£7.58
£2.94 P&P
Only 2 left
WIRELESS DOOR WINDOW CARAVAN SHED MOTORHOME BOAT SECURITY SENSOR ALARM 85DB LOUD
Brand new
(4)
£5.90
Free postage
Click & Collect
203 sold
Reed Magnet Set Burglar Door Window Contact Alarm Switch Sensor N/O(Closed Loop)
Brand new
£2.49 to £7.45
Free postage
359 sold
Reed Magnet Set Burglar Surface Door Window Contact Alarm Switch Sensor + Tamper
Brand new
£3.49 to £14.13
Free postage
212 sold
FRIEDLAND DC55 TWIN PACK STANDARD WIRELESS WINDOW DOOR CONTACTS 433MHz
Brand new · Friedland
(1)
£8.90
Free postage
Click & Collect
75 sold
Response Friedland SLHISM / SLM Wireless Door / Window Sensor 868MHz /RRP £39.95
Brand new · Friedland
£37.95
£3.99 P&P
Only 2 left
3 x TUYA WiFi 4G GSM Wireless Door & Window Sensors For Smart Burglar Alarm
Brand new
£17.00
Free postage
Click & Collect
Sekyo Smart WiFi Door & Window Sensor for Home| No Hub Required-4 Pack
Brand new
£26.16
or Best Offer
£2.70 P&P
Click & Collect
Reed Magnet Set Burglar Door Window Contact Alarm Switch Sensor N/C (Open loop)
Brand new
£5.95 to £18.75
Free postage
Click & Collect
Honeywell Wireless Door & Window Sensor Twin Pack - HS3MAG2S
Brand new · Honeywell
(3)
£14.95
Free postage
Click & Collect
66 sold
Surface Magnet Set Aluminium Metal Door Contact Alarm Switch Normally Closed-UK
Brand new · Unbranded
£5.99
Free postage
Click & Collect
66 sold
Aqara Door and Window Sensor - Aqara Hub Required
Brand new
£16.98
(£16.98/Unit)
Free postage
Click & Collect
75 sold
Xiaomi Mi Door and Window Sensor 2 Bluetooth Version 2 New UK
Brand new · Xiaomi
£6.99
Free postage
Click & Collect
4 x Monitored Alarm and CCTV Installed Stickers Camera Security Warning Signs M4
Brand new · Platinum
£3.98
Free postage
295 sold
White 7 Way Burglar Alarm Connection Junction Boxes Connector with Leaf Tampers
Brand new
£2.25 to £14.20
Free postage
85 sold
Shock Sensor & Magnetic Door Contact For Burglar Alarm | by Texecom
Brand new · Texecom
£39.80
(£39.80/Unit)
Free postage
Est. delivery Wed, Aug 6
NEW 2 Wireless Window Door Burglar Security Alarm 100dB Magnetic Sensor Home
Brand new
£4.50
(£2.25/100g)
Free postage
104 sold
5 x Stickers Monitored Alarm System Installed CCTV Cameras Security Window RED
Brand new · Platinum
£3.58
Free postage
106 sold
SmartThings Multipurpose Door Window Sensor Alexa Google IFTTT White
Brand new · SmartThings
£22.99
Free postage
Est. delivery Thu, Aug 7
182 sold
4 x Monitored Alarm Installed CCTV Camera Security Warning Window Stickers Signs
Brand new · Platinum
£3.98
Free postage
324 sold
Zigbee Smart Door Window Sensor - App Control, Works with Alexa & Google Home
Brand new
£10.32 to £30.17
Free postage
WiFi Door Sensor Window Detector: Smart Window Contact Sensor, Wireless 4-pack.
New (other)
£29.99
Free postage
Click & Collect
Panamalar Wifi Door Window Sensor, Alexa/Google Home Compatible RRP £20
Brand new
£15.99
Free postage
Click & Collect
DorWatcher 12VDC Mains Battery Powered Door Held Open Fire Alarm Set Time Delay
Brand new
£49.00
Free postage
6 Terminal Reed Magnet Surface Door Window Contact Alarm Switch Sensor + Tamper
Brand new
£4.98 to £16.61
Free postage
Grade 3 Contact, surface, suitable for Double Doors with MID, suits all panels
Brand new · Knight
£17.74
Free postage
Click & Collect
Only 2 left
Surface Magnet Potted Aluminium Metal Door Contact Burglar Alarm Switch Sensor
Brand new
£9.35 to £39.90
Free postage
Click & Collect
Wired Door Window Contact Detector White Surface for Intruder Burglar Alarm
Brand new
£2.99
£2.45 P&P
587 sold
Friedland Mini Door Contact Entry Alarm Door Chime Bell Cupboard MA3 JOBLOT
Brand new · Friedland
£2.22
or Best Offer
£1.80 P&P
162 sold
Defender window alert alarm
Brand new · Defender
£6.50
or Best Offer
Free postage
WI-FI Door Window Sensors Works with Amazon Alexa & Google Assistant PACK OF 4
Brand new · Unbranded
£29.23
(£7.31/Unit)
or Best Offer
Free postage
Click & Collect
Smart Door Window Sensor WiFi App Detector Phone Alarm Alexa Google Safety New
Brand new
£12.99
Free postage
Click & Collect
Only 1 left.
2X Yale door / window contact for Yale HSA6600 HSA6400 & HSA6300 alarm system
New (other) · Yale
£24.94
£3.38 P&P
KUBU Smart Hub & Sensor for 1x Window RRP £160 Brand New
Brand new
£69.00
or Best Offer
£2.94 P&P
Click & Collect
0 bids
13h 23m
Mini Surface Magnet Set Aluminium Metal Door Contact Burglar Alarm Switch Sensor
Brand new
£4.89 to £19.80
(£19.80/Unit)
Free postage
83 sold
White 10 Way Burglar Alarm Connection Junction Boxes Connector with Leaf Tampers
Brand new
£2.49 to £10.90
Free postage
1 MOBILE Monitored Alarm System Installed External Stickers Security Sign
Brand new · Platinum
£2.49
Free postage
582 sold
2 LOUD 95DB WIRELESS DOOR WINDOW ALARMS VIBRATION SHOCK GLASS BREAK HOME OFFICE
Brand new
£8.19
Free postage
Click & Collect
72 sold
Honeywell Wireless Door & Window Sensor - HS3MAG1S
Brand new · Honeywell
(2)
£8.95
Free postage
Click & Collect
98 sold
4 Stickers MOBILE Monitored Alarm System Installed Window Signs Warning Security
Brand new · Platinum
£3.98
Free postage
1,404 sold
Reed Magnet Set Burglar Pencil Flush Door Contact Alarm Switch Sensor
Brand new
£3.29 to £10.69
Free postage
84 sold
Yale Indoor Window Door Contact
Brand new · Yale
£17.19
£2.94 P&P
Infrared Driveway Alarm,Yard, Farm, Garage/DoorAlarm,Single Beam,Remote Control.
Brand new
£75.00
£4.20 P&P
Click & Collect
22 watching
1x Wireless Window & Door Burglar Security Alarm System Self Adhesive
Brand new · Unbranded
£2.75
Free postage
ERA miGuard Wireless Alarm Door Window Sensor EMAG 433MHz / RRP £24.99 SAVE £5
Brand new
(3)
£19.99
£2.99 P&P
Only 2 left
2x DEFENDER WINDOW SHOCK ALARM VIBRATION ATTACK SENSOR
Brand new · Defender
(4)
£5.43
(£1.36/Unit)
or Best Offer
£2.94 P&P
Hive Smart Sensor for Windows Or Doors - White Home Security Alert Open Safety
New (other) · Hive
(28)
£18.99
Free postage
Click & Collect
Glass Guard Window Alert Alarm Vibration Shock Sensitive Glass Break
Brand new · Unbranded
£6.49
£2.99 P&P
Click & Collect
5 Screw Single Reed Surface Contact
Brand new · Knight
£5.21
Free postage
Click & Collect
2 Piece Door And Window Entry Alarm Set 2Pc Security Device Alert Burglar Home
Brand new · Amtech
(27)
£7.17
or Best Offer
Free postage
Click & Collect
Only 1 left.
WiFi Smart Door Window Sensor Detector with Real-time Alarm, compatible with Ale
Brand new
£9.45
£2.95 P&P
Click & Collect
Shed Alarm, door magnet 12v/240v security system Shed, Lock up remote option
Brand new · Unbranded
£54.75 to £59.95
(£59.95/Unit)
£4.99 P&P
Click & Collect

Best selling

See all

Hive HAH2SENSOR Window and Door Sensor
(28)
£19.95 New
£9.17 Used
Uni-com 65463 Window and Door Alarm
(4)
£5.90 New
2x Yale Pet PIR Motion Detector Smart Living
(6)
£14.95 New
Xiaomi Mi Door and Window Sensor 2 Bluetooth Version 2 UK
£6.99 New
Magnetic Contact Keypad Door Alarm Security Code Bell Home Caravan Garage Shed
(9)
£8.99 New
Amtech 2pc Door and Window Entry Alarm Set Garage Workshop Tool DIY
(27)
£7.17 New
Pyronix KX Dual Tech Internal Motion Detector. Kx15dt
£28.00 New
Pyronix CARDEFENDER-WE Security Motion Sensor for Cars and Vans Vehicle
£48.99 New

Top-rated

See all

Hive HAH2SENSOR Window and Door Sensor
(28)

95% agree - Would recommend
£19.95 New
£9.17 Used
Defender EL00001 Window Alert 2 Pcs
(6)

100% agree - Would recommend
£5.00 New
Amtech 2pc Door and Window Entry Alarm Set Garage Workshop Tool DIY
(27)

83% agree - Would recommend
£7.17 New
Magnetic Contact Keypad Door Alarm Security Code Bell Home Caravan Garage Shed
(9)

66% agree - Would recommend
£8.99 New

Brand

Window Sensors

Shop by category

601 results

Reed Magnet Set Burglar Door Window Contact Alarm Switch Sensor N/O(Closed Loop)

Link2Home Wireless Door/window Sensor Secure Kit Up To 24 Month Battery Life

Link2Home Wireless Door/window Sensor Secure Kit Up To 24 Month Battery Life

Response Alarms Door Window Detector 433MHz SA Range INCLUDING GUIDE /RRP £39.95

New listingHive Active Home Door and Window Contact Sensor

Hive Smart Sensor for Windows and Doors - White

Infrared Driveway Alarm,Yard,Farm, Garage/DoorAlarm,Single Beam,Remote Control.

4 X WIRELESS DOOR WINDOW CARAVAN SHED MOTORHOME BOAT SECURITY SENSOR ALARMS 85DB

2x Defender Door Handle Alarm (with Batteries)

WIRELESS DOOR WINDOW CARAVAN SHED MOTORHOME BOAT SECURITY SENSOR ALARM 85DB LOUD

Reed Magnet Set Burglar Door Window Contact Alarm Switch Sensor N/O(Closed Loop)

Reed Magnet Set Burglar Surface Door Window Contact Alarm Switch Sensor + Tamper

FRIEDLAND DC55 TWIN PACK STANDARD WIRELESS WINDOW DOOR CONTACTS 433MHz

Response Friedland SLHISM / SLM Wireless Door / Window Sensor 868MHz /RRP £39.95

3 x TUYA WiFi 4G GSM Wireless Door & Window Sensors For Smart Burglar Alarm

Sekyo Smart WiFi Door & Window Sensor for Home| No Hub Required-4 Pack

Reed Magnet Set Burglar Door Window Contact Alarm Switch Sensor N/C (Open loop)

Honeywell Wireless Door & Window Sensor Twin Pack - HS3MAG2S

Surface Magnet Set Aluminium Metal Door Contact Alarm Switch Normally Closed-UK

Aqara Door and Window Sensor - Aqara Hub Required

Xiaomi Mi Door and Window Sensor 2 Bluetooth Version 2 New UK

4 x Monitored Alarm and CCTV Installed Stickers Camera Security Warning Signs M4

White 7 Way Burglar Alarm Connection Junction Boxes Connector with Leaf Tampers

Shock Sensor & Magnetic Door Contact For Burglar Alarm | by Texecom

NEW 2 Wireless Window Door Burglar Security Alarm 100dB Magnetic Sensor Home

5 x Stickers Monitored Alarm System Installed CCTV Cameras Security Window RED

SmartThings Multipurpose Door Window Sensor Alexa Google IFTTT White

4 x Monitored Alarm Installed CCTV Camera Security Warning Window Stickers Signs

Zigbee Smart Door Window Sensor - App Control, Works with Alexa & Google Home

WiFi Door Sensor Window Detector: Smart Window Contact Sensor, Wireless 4-pack.

Panamalar Wifi Door Window Sensor, Alexa/Google Home Compatible RRP £20

DorWatcher 12VDC Mains Battery Powered Door Held Open Fire Alarm Set Time Delay

6 Terminal Reed Magnet Surface Door Window Contact Alarm Switch Sensor + Tamper

Grade 3 Contact, surface, suitable for Double Doors with MID, suits all panels

Surface Magnet Potted Aluminium Metal Door Contact Burglar Alarm Switch Sensor

Wired Door Window Contact Detector White Surface for Intruder Burglar Alarm

Friedland Mini Door Contact Entry Alarm Door Chime Bell Cupboard MA3 JOBLOT

Defender window alert alarm

WI-FI Door Window Sensors Works with Amazon Alexa & Google Assistant PACK OF 4

Smart Door Window Sensor WiFi App Detector Phone Alarm Alexa Google Safety New

2X Yale door / window contact for Yale HSA6600 HSA6400 & HSA6300 alarm system

KUBU Smart Hub & Sensor for 1x Window RRP £160 Brand New

Mini Surface Magnet Set Aluminium Metal Door Contact Burglar Alarm Switch Sensor

White 10 Way Burglar Alarm Connection Junction Boxes Connector with Leaf Tampers

1 MOBILE Monitored Alarm System Installed External Stickers Security Sign

2 LOUD 95DB WIRELESS DOOR WINDOW ALARMS VIBRATION SHOCK GLASS BREAK HOME OFFICE

Honeywell Wireless Door & Window Sensor - HS3MAG1S

4 Stickers MOBILE Monitored Alarm System Installed Window Signs Warning Security

Reed Magnet Set Burglar Pencil Flush Door Contact Alarm Switch Sensor

Yale Indoor Window Door Contact

Infrared Driveway Alarm,Yard, Farm, Garage/DoorAlarm,Single Beam,Remote Control.

1x Wireless Window & Door Burglar Security Alarm System Self Adhesive

ERA miGuard Wireless Alarm Door Window Sensor EMAG 433MHz / RRP £24.99 SAVE £5

2x DEFENDER WINDOW SHOCK ALARM VIBRATION ATTACK SENSOR

Hive Smart Sensor for Windows Or Doors - White Home Security Alert Open Safety

Glass Guard Window Alert Alarm Vibration Shock Sensitive Glass Break

5 Screw Single Reed Surface Contact

2 Piece Door And Window Entry Alarm Set 2Pc Security Device Alert Burglar Home

WiFi Smart Door Window Sensor Detector with Real-time Alarm, compatible with Ale

Shed Alarm, door magnet 12v/240v security system Shed, Lock up remote option

Best selling

Hive HAH2SENSOR Window and Door Sensor

Uni-com 65463 Window and Door Alarm

2x Yale Pet PIR Motion Detector Smart Living

Xiaomi Mi Door and Window Sensor 2 Bluetooth Version 2 UK

Magnetic Contact Keypad Door Alarm Security Code Bell Home Caravan Garage Shed

Amtech 2pc Door and Window Entry Alarm Set Garage Workshop Tool DIY

Pyronix KX Dual Tech Internal Motion Detector. Kx15dt

Pyronix CARDEFENDER-WE Security Motion Sensor for Cars and Vans Vehicle

Top-rated

Hive HAH2SENSOR Window and Door Sensor

Defender EL00001 Window Alert 2 Pcs

Amtech 2pc Door and Window Entry Alarm Set Garage Workshop Tool DIY

Magnetic Contact Keypad Door Alarm Security Code Bell Home Caravan Garage Shed

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