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    • Home Security
    • Door & Window Sensors

    Door & Window Sensors

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    • Home Security
    • Door & Window Sensors
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    • Door Alarm

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    Best selling

    See all- Best selling
    • Texecom GHC0001 Ricochet Micro Wireless Shock Sensor - White
      Texecom GHC0001 Ricochet Micro Wireless Shock Sensor - White
      5 out of 5 stars (2)Total ratings 2
      £49.00 New
    • Smart-i Wireless Smart Alarm Gateway Model SHG100
      Smart-i Wireless Smart Alarm Gateway Model SHG100
      £9.95 New
    • Texecom Premier Elite Kit-0086 64 Zone Wireless Home Burglar Alarm Security
      Texecom Premier Elite Kit-0086 64 Zone Wireless Home Burglar Alarm Security
      5 out of 5 stars (1)Total ratings 1
      £219.95 New
    • Pyronix MC1MINI-WE Wireless Enforcer Magnetic Door Contact -White
      Pyronix MC1MINI-WE Wireless Enforcer Magnetic Door Contact -White
      4.7 out of 5 stars (3)Total ratings 3
      £32.00 New
    • Texecom Ricochet Premier Elite 64W-LIVE Wireless Alarm Kit | KIT-1003
      Texecom Ricochet Premier Elite 64W-LIVE Wireless Alarm Kit | KIT-1003
      £274.99 New
    • Scantronic I-on40 Hybrid Wired Wireless Control Panel Alarm
      Scantronic I-on40 Hybrid Wired Wireless Control Panel Alarm
      £236.24 New
    • Honeywell Home SI800MS Internal Siren White
      Honeywell Home SI800MS Internal Siren White
      £30.00 New
    • B6 Shop Door Entry Chime Alert PIR Wireless Visitor Alarm Motion Sensor Detector
      B6 Shop Door Entry Chime Alert PIR Wireless Visitor Alarm Motion Sensor Detector
      4.3 out of 5 stars (7)Total ratings 7
      £12.99 New
    • All

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    • List view

    2,313 results

      • Window Sensor
      • All listings filter applied
    • HONEYWELL AC034 - SURFACE Magnetic Intruder Alarm Door Contacts
      SPONSORED

      HONEYWELL AC034 - SURFACE Magnetic Intruder Alarm Door Contacts

      £2.99
      Free postage
      349 sold
    • Yale HSA Door Window Contact (HSA Range ONLY) - BRAND NEW - BOXED
      SPONSORED

      Yale HSA Door Window Contact (HSA Range ONLY) - BRAND NEW - BOXED

      5 out of 5 stars (59)59 product ratings - Yale HSA Door Window Contact (HSA Range ONLY) - BRAND NEW - BOXED
      £14.99
      Click & Collect
      (£14.99/Unit)
      Free postage
    • WIRELESS LOUD BURGLAR INTRUDER DOOR WINDOW HOUSE SECURITY SAFETY ALARM SENSOR
      SPONSORED

      WIRELESS LOUD BURGLAR INTRUDER DOOR WINDOW HOUSE SECURITY SAFETY ALARM SENSOR

      £2.49 to £9.49
      Free postage
      14 watching
    •  8 WIRELESS LOUD BURGLAR INTRUDER WINDOW DOOR HOUSE SECURITY SAFETY SENSOR ALARM
      SPONSORED

      8 WIRELESS LOUD BURGLAR INTRUDER WINDOW DOOR HOUSE SECURITY SAFETY SENSOR ALARM

      £3.99 to £9.99
      Free postage
      113 sold
    • 4 WIRELESS LOUD BURGLAR INTRUDER DOOR WINDOW HOUSE SECURITY SAFETY ALARM SENSOR

      4 WIRELESS LOUD BURGLAR INTRUDER DOOR WINDOW HOUSE SECURITY SAFETY ALARM SENSOR

      £4.49
      (£1.12/Unit)
      Free postage
      902 sold
    • Wired Intruder Burglar Alarm Door Window Surface Contact Detector White

      Wired Intruder Burglar Alarm Door Window Surface Contact Detector White

      £3.99
      Free postage
      878 sold
    • Safety & Security Window Film Anti Shatter Clear Glass Protection Bomb Blast

      Safety & Security Window Film Anti Shatter Clear Glass Protection Bomb Blast

      £0.99 to £493.75
      Free postage
    • HONEYWELL AC034 - SURFACE Magnetic Intruder Alarm Door Contacts

      HONEYWELL AC034 - SURFACE Magnetic Intruder Alarm Door Contacts

      5 out of 5 stars (89)89 product ratings - HONEYWELL AC034 - SURFACE Magnetic Intruder Alarm Door Contacts
      £2.80
      (£2.80/Unit)
      Free postage
      1,307 sold
    • 4 x HOUSE ALARM VINYL STICKER/ DECAL , WINDOW WARNING SECURITY SIGNS

      4 x HOUSE ALARM VINYL STICKER/ DECAL , WINDOW WARNING SECURITY SIGNS

      £2.50
      (£2.50/Unit)
      £0.66 postage
      429 sold
    • NEW 2 Wireless Window Door Burglar Security Alarm 105dB Magnetic Sensor Home

      NEW 2 Wireless Window Door Burglar Security Alarm 105dB Magnetic Sensor Home

      £3.49
      (£1.75/100g)
      Free postage
      411 sold
    • Swann Wireless Window Sensor Alarm | Glass Break Vibration | 110DB | Burglar

      Swann Wireless Window Sensor Alarm | Glass Break Vibration | 110DB | Burglar

      £6.99
      Click & Collect
      (£6.99/Unit)
      or Best Offer
    • DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY

      DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY

      £6.50 to £35.00
      Click & Collect
      Free postage
    • Honeywell IS312 Passive Infrared Motion Sensor PIR Pet immune - Replaces IS215T

      Honeywell IS312 Passive Infrared Motion Sensor PIR Pet immune - Replaces IS215T

      5 out of 5 stars (37)37 product ratings - Honeywell IS312 Passive Infrared Motion Sensor PIR Pet immune - Replaces IS215T
      £11.20
      Click & Collect
      (£11.20/Unit)
      Free postage
      Only 2 left
    • 1 pair magnetic door window security alarm contacts white stick on pads 52x12x12
      SPONSORED

      1 pair magnetic door window security alarm contacts white stick on pads 52x12x12

      £1.99
      Free postage
    • Tuya Smart WiFi Cloud Home Security & Alarm System works with Alexa/Google - UK
      SPONSORED

      Tuya Smart WiFi Cloud Home Security & Alarm System works with Alexa/Google - UK

      £0.99 to £124.50
      Free postage
    • Wedge Door Stop Alarm System Device Intruder Alert Home Security 120dB
      SPONSORED

      Wedge Door Stop Alarm System Device Intruder Alert Home Security 120dB

      4.5 out of 5 stars (13)13 product ratings - Wedge Door Stop Alarm System Device Intruder Alert Home Security 120dB
      £6.98
      Click & Collect
    • Pyronix MC1MINI-WE Wireless Enforcer Magnetic Door Contact

      Pyronix MC1MINI-WE Wireless Enforcer Magnetic Door Contact

      4.5 out of 5 stars (3)3 product ratings - Pyronix MC1MINI-WE Wireless Enforcer Magnetic Door Contact
      £25.00
      Click & Collect
      or Best Offer
    • Hive Window or Door Sensor - White

      Hive Window or Door Sensor - White

      £9.52
      5 bids
      £4.45 postage
      Ending Sunday at 6:30PM BST1d 11h
    • Texecom Premier Elite Micro Contact White GHA-0001-C

      Texecom Premier Elite Micro Contact White GHA-0001-C

      5 out of 5 stars (2)2 product ratings - Texecom Premier Elite Micro Contact White GHA-0001-C
      £1.00
      1 bid
      £3.35 postage
      Ending Sunday at 5:56PM BST1d 11h
    • Door Stop Alarm Wireless Home Travel Security System Portable Safety Wedge Al S_

      Door Stop Alarm Wireless Home Travel Security System Portable Safety Wedge Al S_

      £7.82
      Free postage
      or Best Offer
    • 2x Burglar Alarm Stickers Small Security Garage Shed Doors Windows [RV6SECU87B]

      2x Burglar Alarm Stickers Small Security Garage Shed Doors Windows [RV6SECU87B]

      £1.45
      (£1.45/Unit)
      Free postage
    • WiFi Smart Door Window Sensor Alarm Home Security Detector For Alexa Google

      WiFi Smart Door Window Sensor Alarm Home Security Detector For Alexa Google

      £9.99
      Click & Collect
      (£9.99/Unit)
      Free postage
    • 2 x WARNING ALARM SYSTEM INSTALLED  VINYL STICKER/ WINDOW WARNING SECURITY SIGNS

      2 x WARNING ALARM SYSTEM INSTALLED VINYL STICKER/ WINDOW WARNING SECURITY SIGNS

      £2.00
      £0.66 postage
      174 sold
    • 5 Monitored Alarm System Installed & CCTV Camera Security Warning Window Sticker

      5 Monitored Alarm System Installed & CCTV Camera Security Warning Window Sticker

      £2.49
      Free postage
      1,467 sold
    • Yale Alarm Window Warning Stickers PACK OF 2 OFFICIAL ALARM STICKERS / RRP £3.99

      Yale Alarm Window Warning Stickers PACK OF 2 OFFICIAL ALARM STICKERS / RRP £3.99

      £1.99
      £0.79 postage
      Only 2 left
    • 6 x Monitored Alarm Installed and CCTV Camera RED/WHITE Security Warning Sticker

      6 x Monitored Alarm Installed and CCTV Camera RED/WHITE Security Warning Sticker

      £3.49
      Free postage
      225 sold
    • 3 x HIVE SECURITY CAMERA VINYL STICKER/ WINDOW WARNING SECURITY SIGNS

      3 x HIVE SECURITY CAMERA VINYL STICKER/ WINDOW WARNING SECURITY SIGNS

      £2.25
      £0.66 postage
      165 sold
    • Wireless GSM WiFi Smart Home Burglar Security Alarm Systems Touch Screen KIT

      Wireless GSM WiFi Smart Home Burglar Security Alarm Systems Touch Screen KIT

      £15.47 to £99.47
      43 watching
    • WiFi Smart Door Window Sensor Home Security Alarm Detector For Alexa Google Home
      SPONSORED

      WiFi Smart Door Window Sensor Home Security Alarm Detector For Alexa Google Home

      £12.99
      Click & Collect
      Free postage
    • Wireless Smart House Alarm System Kit Home Intruder Burglar Smoke PIR Wifi
      SPONSORED

      Wireless Smart House Alarm System Kit Home Intruder Burglar Smoke PIR Wifi

      £9.95 to £29.95
      Click & Collect
    • 2 Pack Wireless Door Window Burglar Alarm Magnetic Sensor with Remote Control UK
      SPONSORED

      2 Pack Wireless Door Window Burglar Alarm Magnetic Sensor with Remote Control UK

      £20.99
      (£20.99/Unit)
      or Best Offer
    • 4 Wireless Window Door Burglar Security Alarm 100dB Magnetic Sensor Home
      SPONSORED

      4 Wireless Window Door Burglar Security Alarm 100dB Magnetic Sensor Home

      £8.99
      Click & Collect
      Free postage
    • 4 x PROTECTED: WINDOW STICKERS MOTION & IMPACT BURGLAR ALARM THEFT WARNING

      4 x PROTECTED: WINDOW STICKERS MOTION & IMPACT BURGLAR ALARM THEFT WARNING

      £3.49
      Free postage
    • Wireless GSM WiFi Smart Home Burglar Security Alarm System Wi Full Touch Screen

      Wireless GSM WiFi Smart Home Burglar Security Alarm System Wi Full Touch Screen

      £12.47 to £120.47
      19 sold
    • NEW WIRELESS 2PC LOUD ALARM 95DB sticky Door Window Office Home Shed Security

      NEW WIRELESS 2PC LOUD ALARM 95DB sticky Door Window Office Home Shed Security

      £5.95
      Click & Collect
      (£2.98/Unit)
      Free postage
      147 sold
    • 1 MOBILE Monitored Alarm System Installed-External Sticker-Warning Security Sign

      1 MOBILE Monitored Alarm System Installed-External Sticker-Warning Security Sign

      £1.99
      Free postage
      561 sold
    • 3 x Defender Security Defender (Wireless) Window Alert Alarm - White - 110dB

      3 x Defender Security Defender (Wireless) Window Alert Alarm - White - 110dB

      £14.99
      Click & Collect
      (£14.99/Unit)
      Free postage
    • X2 Texecom Micro Shock-W Wireless Grey Window Sensor - GHC0002

      X2 Texecom Micro Shock-W Wireless Grey Window Sensor - GHC0002

      £20.00
      0 bids
      £4.45 postage
      Ending 30 May at 3:05PM BST2d 8h
      or Best Offer
      Click & Collect
    • Wireless Security Door Entry Window Burglar Alarm Magnetic Device Sensor Set HOT
      SPONSORED

      Wireless Security Door Entry Window Burglar Alarm Magnetic Device Sensor Set HOT

      £15.87 to £63.80
      Click & Collect
      (£15.87/Unit)
    • Yale Alarm Window Warning Stickers PACK OF 4 OFFICIAL ALARM STICKERS / RRP £5.79
      SPONSORED

      Yale Alarm Window Warning Stickers PACK OF 4 OFFICIAL ALARM STICKERS / RRP £5.79

      £2.99
      £0.79 postage
      Only 2 left
    • NEW 2 Wireless Window Door Burglar Security Alarm 105dB Magnetic Sensor Home

      NEW 2 Wireless Window Door Burglar Security Alarm 105dB Magnetic Sensor Home

      £3.95
      (£1.98/100g)
      Free postage
    • SIMPLISAFE GLASSBREAK SENSOR ~ Home Protection ~ Detects Breaking Glass ~ New

      SIMPLISAFE GLASSBREAK SENSOR ~ Home Protection ~ Detects Breaking Glass ~ New

      £30.00
      Click & Collect
      Free postage
    • Grade 3 Contact, surface, suitable for Double Doors with MID, suits all panels

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

      £11.75
      Click & Collect
    • ERA intruder alarm (WD80) Wireless Vibration Sensor

      ERA intruder alarm (WD80) Wireless Vibration Sensor

      £10.00
      Click & Collect
      Free postage
    • For Tuya Door Window Detector WiFi Smart Wireless Voice Control Alarm Sensor

      For Tuya Door Window Detector WiFi Smart Wireless Voice Control Alarm Sensor

      £7.90
      Free postage
      Only 2 left
    • 6 MOBILE Monitored Alarm System Installed-Window Stickers-Warning Security Signs

      6 MOBILE Monitored Alarm System Installed-Window Stickers-Warning Security Signs

      £3.49
      Free postage
      1,338 sold
    • 1 x Driven by a Crazy Bitch-WHITE-Car,Van,Woman,Sign,Sticker,Adhesive,Window

      1 x Driven by a Crazy Bitch-WHITE-Car,Van,Woman,Sign,Sticker,Adhesive,Window

      £2.48
      Free postage
    • Wireless Full Touch Screen GSM WiFi Smart Home Burglar Security Alarm System UK

      Wireless Full Touch Screen GSM WiFi Smart Home Burglar Security Alarm System UK

      £60.75
      6 watching

    Results pagination - page 1

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    Highest-rated products

    See all- Highest-rated products
    • 4x Honeywell AC034 Surface Magnetic Intruder Alarm Door Contact
      4x Honeywell AC034 Surface Magnetic Intruder Alarm Door Contact
      4.8 out of 5 stars (89)Total ratings 89
      96% agree - Would recommend
      £2.80 New
    • Yale B-HSA6010 Door Contact and Magnet
      Yale B-HSA6010 Door Contact and Magnet
      4.9 out of 5 stars (59)Total ratings 59
      100% agree - Would recommend
      £14.99 New
      £11.95 Used
    • Honeywell Infrared Motion Sensor Intruder Alarm - White
      Honeywell Infrared Motion Sensor Intruder Alarm - White
      4.8 out of 5 stars (37)Total ratings 37
      95% agree - Would recommend
      £11.20 New
    • Flush Contact Magnetic Alarm Door Contacts AC033 Honeywell
      Flush Contact Magnetic Alarm Door Contacts AC033 Honeywell
      4.9 out of 5 stars (35)Total ratings 35
      100% agree - Would recommend
      £2.99 New
    • Hive HAH2SENSOR Window and Door Sensor
      Hive HAH2SENSOR Window and Door Sensor
      4.8 out of 5 stars (24)Total ratings 24
      95% agree - Would recommend
      £29.00 New
      £22.00 Used
    • Response Alarms Door Window Detector 433mhz SA E Range Sa2
      Response Alarms Door Window Detector 433mhz SA E Range Sa2
      4.9 out of 5 stars (17)Total ratings 17
      100% agree - Would recommend
      £22.95 New
    • Yale ‎EFPIR Motion Detector - White
      Yale ‎EFPIR Motion Detector - White
      4.9 out of 5 stars (15)Total ratings 15
      100% agree - Would recommend
      £12.99 New
      £10.99 Used
    • Yale AC-DC Smart Living Sync Door Contact - White
      Yale AC-DC Smart Living Sync Door Contact - White
      5 out of 5 stars (14)Total ratings 14
      100% agree - Would recommend
      £19.90 New
      £16.80 Used

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