Skip to main content
eBay logo

Shop by category

Advanced
    • Nectar
    • Daily Deals
    • Brand Outlet
    • Help & Contact
    • Queen s Jubilee
    • Sell
    • Watch ListExpand watch list
      Loading...
      Sign in to see your user information
    • My eBayExpand My eBay
      • Summary
      • Recently Viewed
      • Bids/Offers
      • Watch List
      • Purchase History
      • Selling
      • Saved Searches
      • Saved Sellers
      • My Garage
      • Messages
      • Collect & Spend
        Learn more
    • Expand Basket
      Loading...
      Something went wrong. View basket for details.
    {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}
    {"delay":300}

    There seems to be a problem completing the request at present.

    You are here

    • eBay
    • Home, Furniture & DIY
    • Home Security
    • Water & Temperature Detectors

    Water & Temperature Detectors

    Side Refine Panel

    Shop by category

    • Home Security
    • Water & Temperature Detectors
    • Alarm Systems
    • Door Entry Systems & Intercoms
    • Door & Window Sensors
    • Dummy Bell Boxes
    • Fire Escape Ladders
    • Key Safes, Boxes & Hideaways
    • Key Blanks
    • Key Fobs
    • Glass Break Detectors
    • Padlocks
    • Personal Alarms
    • Safes
    • Security Bars & Grills
    • Security Keypads
    • Security Signs & Decals
    • Security Timers
    • Sirens
    • Smoke & Gas Detectors
    • Wall Spikes & Barbed Wire
    • Remotes & Wireless Transmitters
      • Home Security Parts
      • Other Home Security
    LessView less categories

    Best selling

    See all- Best selling
    • Honeywell Lyric W1 Wi-fi Water Leak and Freeze Detector W1KS
      Honeywell Lyric W1 Wi-fi Water Leak and Freeze Detector W1KS
      4.5 out of 5 stars (2)Total ratings 2
      £108.98 New
    • on OFFER Water Leak Alarm Moisture Flood Detector Sensor Can Be as Safety
      on OFFER Water Leak Alarm Moisture Flood Detector Sensor Can Be as Safety
      4.3 out of 5 stars (20)Total ratings 20
      £8.95 New
    • Honeywell WD4SE Water Leak Alarm - White (4 Pack)
      Honeywell WD4SE Water Leak Alarm - White (4 Pack)
      4.6 out of 5 stars (9)Total ratings 9
      £7.00 New
    • 120db Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security
      120db Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security
      4.5 out of 5 stars (20)Total ratings 20
      £6.75 New
    • ERA Wireless Battery-Operated Water Detector
      ERA Wireless Battery-Operated Water Detector
      £9.99 New
    • Smartwares Sh8-90102 - Water Detector
      Smartwares Sh8-90102 - Water Detector
      £9.99 New
    • 10x(water Overflow Leakage Alarm Sensor Detector 90db Water Level Leak Flood D7)
      10x(water Overflow Leakage Alarm Sensor Detector 90db Water Level Leak Flood D7)
      4.5 out of 5 stars (2)Total ratings 2
      £6.38 New
    • All

    • Auction

    • Buy it now

    • Best Match
    • Price + postage: lowest first
    • Price + postage: highest first
    • Lowest price
    • Highest price
    • Time: ending soonest
    • Time: newly listed
    • Distance: nearest first
    • List view

    521 results

      • Unbranded
      • Water Detector
      • Humidity Station
      • Room Monitor
      • All listings filter applied
    • Water Leak Detector Moisture Sensor Bath Overflow Flood Level Alarm
      SPONSORED

      Water Leak Detector Moisture Sensor Bath Overflow Flood Level Alarm

      4.5 out of 5 stars (20)20 product ratings - Water Leak Detector Moisture Sensor Bath Overflow Flood Level Alarm
      £8.95
      Click & Collect
      Free postage
      Only 3 left
    • Water Leak Alarm Leak Detector without Battery for Basement Apartment Kitchen
      SPONSORED

      Water Leak Alarm Leak Detector without Battery for Basement Apartment Kitchen

      £5.77
      Free postage
    • High Sensitive Leak Detector Loud Water Leak Alarm without Battery for Basement
      SPONSORED

      High Sensitive Leak Detector Loud Water Leak Alarm without Battery for Basement

      £10.85
      Free postage
    • 2x 85dB Water Leak Flood Sink Washer Overflow Detector Sensor Alarm Alert
      SPONSORED

      2x 85dB Water Leak Flood Sink Washer Overflow Detector Sensor Alarm Alert

      £16.99
      Click & Collect
      Free postage
    • Water Leak Alarm, Protect Your Home.

      Water Leak Alarm, Protect Your Home.

      £4.99
      Free postage
    • Water Leak Detector Moisture Sensor Bath Overflow Flood Level Alarm Dual Sensor

      Water Leak Detector Moisture Sensor Bath Overflow Flood Level Alarm Dual Sensor

      £9.99
      Click & Collect
      Free postage
    • HIVE Leak Detector Sensor New/Sealed - C44

      HIVE Leak Detector Sensor New/Sealed - C44

      £9.99
      0 bids
      £3.50 postage
      Ending 5 Jun at 9:17PM BST8d 15h
    • Honeywell Homexpert RWD1SE Water Leak Alarm  inc VAT

      Honeywell Homexpert RWD1SE Water Leak Alarm inc VAT

      4.5 out of 5 stars (9)9 product ratings - Honeywell Homexpert RWD1SE Water Leak Alarm inc VAT
      £7.00
      Click & Collect
      (£7.00/Unit)
      £1.99 postage
    • Home Security System WIFI Water Leak Sensor Leakage Detector Aler Overflow Alarm

      Home Security System WIFI Water Leak Sensor Leakage Detector Aler Overflow Alarm

      £8.75
      Free postage
    • Resideo W1 Wi-Fi Water Leak And Freeze Detector - White

      Resideo W1 Wi-Fi Water Leak And Freeze Detector - White

      4.5 out of 5 stars (2)2 product ratings - Resideo W1 Wi-Fi Water Leak And Freeze Detector - White
      £25.00
      Click & Collect
      Free postage
    • ONE ELECTRICAL HEAT ALARM ET8002-UK Kitchen Cooking 220-240V Hardwired & Backup

      ONE ELECTRICAL HEAT ALARM ET8002-UK Kitchen Cooking 220-240V Hardwired & Backup

      £7.50
      0 bids
      £3.30 postage
      Ending 2 Jun at 7:28PM BST5d 13h
      or Best Offer
      Click & Collect
    • Samotech Wifi Water Leak Sensors

      Samotech Wifi Water Leak Sensors

      £8.99
      0 bids
      £2.95 postage
      Ending 3 Jun at 5:03PM BST6d 11h
      or Best Offer
    • Honeywell Home Lyric W1 Water Leak and Freeze Detector

      Honeywell Home Lyric W1 Water Leak and Freeze Detector

      £60.00
      0 bids
      £4.00 postage
      Ending Sunday at 3:46PM BST1d 10h
      or Best Offer
      Click & Collect
    • Water Leak Alarm Flood Level Overflow Detector Sensor Pool Bath Home Security
      SPONSORED

      Water Leak Alarm Flood Level Overflow Detector Sensor Pool Bath Home Security

      £10.99 to £18.92
      Click & Collect
      Free postage
    • W2C4 Tuya Zigbee Smart Home Water Leak Sensor Wireless Flooding Detector Water
      SPONSORED

      W2C4 Tuya Zigbee Smart Home Water Leak Sensor Wireless Flooding Detector Water

      £19.99
      Free postage
    • Underground Water Detector Leak Leakage Water Ultrasonic Detector PQWT-CL200
      SPONSORED

      Underground Water Detector Leak Leakage Water Ultrasonic Detector PQWT-CL200

      £1,829.16
      Free postage
      or Best Offer
    • Water Alarm Moisture Flood High Level Detector Sensor Bath/sink Overflow HG

      Water Alarm Moisture Flood High Level Detector Sensor Bath/sink Overflow HG

      £8.44
      Free postage
    • Pyronix 2 Way Wireless Heat Sensor Detector Alarm Battery Powered

      Pyronix 2 Way Wireless Heat Sensor Detector Alarm Battery Powered

      £99.99
      Click & Collect
      Free postage
      or Best Offer
    • GSM Temperature & Power Failure Detector Alarm SMS & Call Security Notification

      GSM Temperature & Power Failure Detector Alarm SMS & Call Security Notification

      £188.00
      Free postage
      18 watching
    • Grohe Sense Guard Smart Water Controller 22513LN0 & extension lead Bundle

      Grohe Sense Guard Smart Water Controller 22513LN0 & extension lead Bundle

      £430.00
    • Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security

      Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security

      £8.79
      Click & Collect
      58 sold
    • Vintage Tandy Radio Shack Safe House Water Alarm

      Vintage Tandy Radio Shack Safe House Water Alarm

      £10.00
      Click & Collect
      £3.85 postage
      or Best Offer
    • Water Leak Alarm moisture flood high level detector sensor bath/sink overflow

      Water Leak Alarm moisture flood high level detector sensor bath/sink overflow

      4.5 out of 5 stars (20)20 product ratings - Water Leak Alarm moisture flood high level detector sensor bath/sink overflow
      £8.10
      Free postage
    • Water Overflow Leakage Alarm Sensor Detector 90dB Water Level Alarm Leak Fl G4V7

      Water Overflow Leakage Alarm Sensor Detector 90dB Water Level Alarm Leak Fl G4V7

      4.5 out of 5 stars (2)2 product ratings - Water Overflow Leakage Alarm Sensor Detector 90dB Water Level Alarm Leak Fl G4V7
      £8.04
      Free postage
    • Yolink Smart Home Starter Kit- Hub & 3 Door Sensors Included

      Yolink Smart Home Starter Kit- Hub & 3 Door Sensors Included

      £38.97
      £12.71 postage
    • Zigbee Frient Water Leak Detector Probe

      Zigbee Frient Water Leak Detector Probe

      £16.00
      Click & Collect
      £3.95 postage
    • SimpliSafe - Water Sensor - For use w/Simplisafe System - White, NEW

      SimpliSafe - Water Sensor - For use w/Simplisafe System - White, NEW

      £16.70
      £11.13 postage
      or Best Offer
    • Water Leak Alarm Flood Level Overflow Detector Sensor Bath or Sink Alert

      Water Leak Alarm Flood Level Overflow Detector Sensor Bath or Sink Alert

      £5.84
      Was: £6.16
      Free postage
      or Best Offer
    • Water Leak Alarm Leak Detector without Battery for Basement Apartment Kitchen
      SPONSORED

      Water Leak Alarm Leak Detector without Battery for Basement Apartment Kitchen

      £5.91
      Free postage
    • 9V Water Leak Alarm Flood Level Overflow Detector Sensor Pool Home Security UK
      SPONSORED

      9V Water Leak Alarm Flood Level Overflow Detector Sensor Pool Home Security UK

      £6.89
      Free postage
    • Water Leak Alarm Leak Detector without Battery for Basement Apartment Kitchen
      SPONSORED

      Water Leak Alarm Leak Detector without Battery for Basement Apartment Kitchen

      £5.91
      Free postage
    • Zigbee Frient Water Leak Detector
      SPONSORED

      Zigbee Frient Water Leak Detector

      £38.00
      Click & Collect
      £3.95 postage
    • FLIR TG297 Industrial High Temp Spot Thermal Camera 160 x 120 Resolution/9Hz

      FLIR TG297 Industrial High Temp Spot Thermal Camera 160 x 120 Resolution/9Hz

      £794.50
      £43.04 postage
      or Best Offer
    • Honeywell Lyric W1 Wi-Fi Water Leak & Freeze Detector

      Honeywell Lyric W1 Wi-Fi Water Leak & Freeze Detector

      £45.00
      £4.45 postage
      or Best Offer
    • Andel 600031 Floodline Horizontal Point Sensor inc Guard Plate.

      Andel 600031 Floodline Horizontal Point Sensor inc Guard Plate.

      £49.95
      Free postage
      or Best Offer
    • LeakSmart Brass 3/4" Compression Automatic Water Shut Off & Detection System

      LeakSmart Brass 3/4" Compression Automatic Water Shut Off & Detection System

      £79.13
      £16.13 postage
      Only 1 left.
    • Faithfull Portable Water Leak Alarm (80db) EW13

      Faithfull Portable Water Leak Alarm (80db) EW13

      5 out of 5 stars (2)2 product ratings - Faithfull Portable Water Leak Alarm (80db) EW13
      £10.99
      Click & Collect
      Free postage
    • Floodline Multi-8 Water Sensor Cable 5m with connectors crimped c/w EOL unit

      Floodline Multi-8 Water Sensor Cable 5m with connectors crimped c/w EOL unit

      £124.95
      £6.10 postage
    • HomeSitter Freeze Temperature Water Power Alarm Auto Phone Dialer Caller HS-700
      SPONSORED

      HomeSitter Freeze Temperature Water Power Alarm Auto Phone Dialer Caller HS-700

      5 out of 5 stars (3)3 product ratings - HomeSitter Freeze Temperature Water Power Alarm Auto Phone Dialer Caller HS-700
      £39.76
      £19.63 postage
      or Best Offer
    • Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security Safe
      SPONSORED

      Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security Safe

      £7.81
      (£7.81/Unit)
      Free postage
    • Electronic Water Temp Gauge Top Mini Digital Thermometer LCD Display Thermometer

      Electronic Water Temp Gauge Top Mini Digital Thermometer LCD Display Thermometer

      £5.14 to £5.46
      Free postage
    • Battery Water & Flood Alarm with Output Relays & Built in Buzzer

      Battery Water & Flood Alarm with Output Relays & Built in Buzzer

      £30.90
      Click & Collect
    • Guardian Leak Detector GLD1 v2

      Guardian Leak Detector GLD1 v2

      5 out of 5 stars (1)1 product ratings - Guardian Leak Detector GLD1 v2
      £31.80
      £11.48 postage
    • Govee WiFi Water Sensor 3 Pk Water Leak Detector w/ Wifi Gateway 100dB Alarm

      Govee WiFi Water Sensor 3 Pk Water Leak Detector w/ Wifi Gateway 100dB Alarm

      £31.80
      £18.67 postage
    • Honeywell 5800FLOOD Wireless All In One Flood Detector Temperature Sensor

      Honeywell 5800FLOOD Wireless All In One Flood Detector Temperature Sensor

      £25.44
      £11.33 postage
    • Nedis WiFi Smart Enabled App Alarm Alert Water Leak Detector Battery powered

      Nedis WiFi Smart Enabled App Alarm Alert Water Leak Detector Battery powered

      £33.92
      Click & Collect
      Free postage
    • WiFi Alarm Water Leakage Alarm Water Leak Detector Alert Overflow Home Security

      WiFi Alarm Water Leakage Alarm Water Leak Detector Alert Overflow Home Security

      £9.35
      Free postage

    Results pagination - page 1

    1. 1
    2. 2
    3. 3
    4. 4
    5. 5
    6. 6
    7. 7
    8. 8
    9. 9
    10. 10

    Highest-rated products

    See all- Highest-rated products
    • 120db Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security
      120db Water Leak Alarm Flood Level Overflow Detector Sensor Alert Home Security
      4.5 out of 5 stars (20)Total ratings 20
      94% agree - Would recommend
      £6.75 New
    • on OFFER Water Leak Alarm Moisture Flood Detector Sensor Can Be as Safety
      on OFFER Water Leak Alarm Moisture Flood Detector Sensor Can Be as Safety
      4.3 out of 5 stars (20)Total ratings 20
      88% agree - Would recommend
      £8.95 New
    • Honeywell WD4SE Water Leak Alarm - White (4 Pack)
      Honeywell WD4SE Water Leak Alarm - White (4 Pack)
      4.6 out of 5 stars (9)Total ratings 9
      100% agree - Would recommend
      £7.00 New

    You may also like

    • Home Security Locks

      Home Security Locks

    • Home Alarm Systems

      Home Alarm Systems

    • Home Security Equipment

      Home Security Equipment

    • Home Security Safes

      Home Security Safes

    • Home Smoke & Gas Detectors

      Home Smoke & Gas Detectors

    • Fresh deals this way!

      Find what you’re looking for, for even less.
      Shop now
    • Outsunny Charcoal Grill BBQ Trolley Wheels Shelf Side Thermometer Steel Black
      Outsunny Charcoal Grill BBQ Trolley Wheels Shelf Side Thermometer Steel Black
      £165.99
    • Apple AirPods 3rd Generation with MagSafe Charging Case New 2021 MME73ZM/A
      Apple AirPods 3rd Generation with MagSafe Charging Case New 2021 MME73ZM/A
      £169.00
      was -£183.97 | 8% OFF
    • Calvin Klein CK One Summer 2017 100ml Eau De Toilette EDT Spray For Men
      Calvin Klein CK One Summer 2017 100ml Eau De Toilette EDT Spray For Men
      £15.99
    • Lenovo V15 Laptop Intel Celeron N4020 8GB RAM 256GB SSD 15.6" Windows 10 Home
      Lenovo V15 Laptop Intel Celeron N4020 8GB RAM 256GB SSD 15.6" Windows 10 Home
      £279.99
    • Tassimo Coffee Pods L'OR Latte Macchiato Skinny 6 Packs (42 Drinks)
      Tassimo Coffee Pods L'OR Latte Macchiato Skinny 6 Packs (42 Drinks)
      £22.30
      (£3.72/Unit)Unit price: £3.72 per Unit
      was -£27.50 | 19% OFF
    • LUXURY CRUSHED VELVET BED + MEMORY MATTRESS + HEADBOARD 3FT 4FT 4FT6 Double 5FT
      LUXURY CRUSHED VELVET BED + MEMORY MATTRESS + HEADBOARD 3FT 4FT 4FT6 Double 5FT
      £215.99
      was -£239.99 | 10% OFF
    • Dyson Small Ball Allergy – Refurbished
      Dyson Small Ball Allergy – Refurbished
      £159.99
      was -£199.99 | 20% OFF

    Additional site navigation

    • About eBay
    • Announcements
    • Community
    • Safety Centre
    • Seller Centre
    • VeRO: Protecting Intellectual Property
    • Policies
    • Help & Contact
    • Site Map
    Copyright © 1995-2022 eBay Inc. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoiceNorton Secured - powered by DigiCert