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💧 Stay dry, stay smart — never miss a drip with SwitchBot!
The SwitchBot WiFi Water Leak Detector is a compact, hub-free smart sensor that detects water leaks as small as 0.5mm with four precision probes. It connects directly to 2.4GHz WiFi, sending instant 100dB alarms and app/email alerts to you and your family. Rated IP67 waterproof and powered by 2 AAA batteries lasting up to 24 months, it’s designed for versatile placement in kitchens, bathrooms, basements, and more. Compatible with major smart home platforms, it offers proactive, reliable flood protection for modern connected homes.


















| ASIN | B0CRRL9DNN |
| Battery Description | Alkaline |
| Battery description | Alkaline |
| Best Sellers Rank | 13,270 in DIY & Tools ( See Top 100 in DIY & Tools ) 2 in Water Detectors |
| Brand | SwitchBot |
| Colour | White |
| Compatible Devices | Alexa, Google Assistant, IFTTT, SmartThings, Smartphone |
| Compatible devices | Alexa, Google Assistant, IFTTT, SmartThings, Smartphone |
| Control Method | App |
| Country of Origin | China |
| Customer Reviews | 4.5 out of 5 stars 963 Reviews |
| Included Components | AAA Battery, User Manual, Warranty Card, Water Leak Detector |
| Item Dimensions L x W x H | 29L x 32W x 78H millimetres |
| Item Type Name | Water Leak Detector |
| Item Weight | 68 Grams |
| Manufacturer | Wonderlabs |
| Maximum Range | 120 Metres |
| Model Number | W4402000 |
| Mounting Type | Floor Mount |
| Number of Batteries | 1 A batteries required. (included) |
| Part Number | W4402000 |
| Power source | Battery Powered |
| Product dimensions | 29L x 32W x 78H millimetres |
| Sensor Technology | Water Sensor |
| Shape | Detector (1 Pack) |
| Sound Level | 100 Decibels |
| UPC | 810150540437 |
| Unit Count | 1.0 count |
| Voltage | 3 Volts |
C**N
Life saver bit of kit
This is a great little piece of kit that has helped me whilst away. It actually activated whilst I was travelling so I could send somebody around to have a look. Turned out to be a false alarm but thankful for it letting me know rather than coming home to a water leak. It’s easy to use and set up. The iPhone app is straightforward and uses notification alerts. I’ve had this for a few months and the battery seems to be OK. I have recommended this sensor to others and will be buying more in the future. A quick, easy, and cost effective way to protect yourself and your home!
R**.
Not all smart devices are born equally...
Not all smart home devices are born equally....Switchbot make good quality, reliable, tech. As with all these things, nothing is perfect. But Switchbot devices are of a high tech standard and they're, generally, reliable - which is the main thing, really.
D**M
Easy to set up
Easy to set up. Have to rely on the app notifications as not very loud.
N**A
Brilliant
Work brilliantly! Had them a while then one day the washer door must not have been closed properly and water was leaking out! Alerts went off on both our phones immediately! And the device let out a loud noise too! Saved us from a big mess
A**J
Excellent Purchase for water alert
Bought this item after basement flooded after heavy rain as drains could not cope with volume of water at night. If I had known we could have prevented some of the damage. I purchased this item and placed it by the water ingress point and the alarm sounds when water reaches the basement an alert sounds on phones and tablets plus an Alexa alert sounds on all the house devices and we can man the pumps. We test regularly to ensure it works and so far it has worked.
O**M
Works warning of a leak
Great bit of kit , saved us twice with leaks but annoying sales messages till blocked
C**R
Must have for anyone that's had to deal with a leak in the past.
Very easy to set up, and the Wi-Fi notification is brilliant. We had a leak with our washing machine, so this was perfect to put underneath just in case the leak occurred again. Very small in size. Definitely needed if you want peace of mind.
M**D
Works with WIFI without any extra equipment.
Installation is easy. Download the app, register, add the batteries, it auto detects then add your 2.4Ghz wi-fi details. Once it connects to the cloud service and you have allowed notifications you get email and notifications once the detector detects even a small amount of water 0.5mm. Initially on the app I thought there was a problem with WIFI because the service was greyed out saying bluetooth was lost... This is NOT a problem as this situation occurs because the device to save power only connects to WIFI once it detects water and alerts. The alerts came thru very quickly. A good bit of kit for an early alert of water somewhere :-)
C**N
Rilevatore di perdite SwitchBot: semplice da installare, affidabile e intelligente
Ho acquistato il rilevatore di perdite d’acqua SwitchBot a gennaio 2025 per installarlo vicino alla caldaia, così da prevenire eventuali perdite o gocciolamenti. Dopo diversi mesi di utilizzo si è dimostrato un prodotto affidabile e molto utile. L’installazione è semplicissima: si configura in pochi minuti tramite l’app SwitchBot, senza bisogno di hub, e può essere posizionato facilmente anche in spazi ristretti. Il sensore rileva immediatamente la presenza di acqua e invia notifiche istantanee sullo smartphone, oltre ad attivare un allarme sonoro ben udibile. Ottima anche l’affidabilità nel tempo: nessun falso allarme e batteria ancora in ottime condizioni. Per chi ha una caldaia in casa o in un locale tecnico, è una soluzione pratica ed efficace per aumentare la sicurezza e prevenire danni. Rapporto qualità-prezzo eccellente. Consigliato senza dubbi.
C**B
fiable, facile a installer et peut éviter les dégâts !
"installé" ( juste posé) dans ma cave sous la tuyauterie de la maison.. il m'a déjà sauvé une fois de gros dégâts en m'alertant pendant que j'étais au travail d'une fuite d'eau d'un raccord qu'il a capté de part le premier niveau du capteur ( humidité) (au delà de qq mm l'autre capteur un peu plus haut alerte aussi de fuite plus importante ) j'ai crée une automatisation pour une alerte claire qui est relayée par wifi. j'ai fait aussi un essais sur place avec l'alarme qui en position forte réveille bien... enfin je "l'emprunte" parfois lorsque je pompe les cuves l'été pour être averti quand plein ( déborde) . très pratique !
G**I
Will buy more
Easy to install and love the fact that it does not need a hub, worked very well-detect water leak and send notifications through wifi. Exactly what I needed.
通**り
観賞魚水槽や建物地下の漏水管理に..
観賞魚水槽でインラインヒーターやCO2ユニットを使っており万一に備えて深めのトレイを敷いているがトラブルがあった際に携帯へすぐにアラートが飛んできてほしいので設置しました。また、半地下潜った場所にあるピットで冠水した際の警報としても使えるように追加設置しました。感度良好で良い製品です。
A**Y
keeps my floor dry, no stress
got the switchbot water leak detector a few weeks ago after a minor basement fiasco (ugh, water everywhere). it’s been a solid little buddy since then. i have it near the water heater, and yeah, love that it alarms if anything sketchy happens. the probe deal is kinda genius – helps it reach tight spots. setting it up was (surprisingly) easy; like, i did it fast without any manual googling. works with the hub too, so it pings my phone when it senses trouble. 10/10, would buy again to avoid panic mop sessions!
Trustpilot
2 weeks ago
1 week ago