









💧 Stay dry, stay smart — never miss a drip again!
The SwitchBot WiFi Water Leak Detector is a compact, IP67 waterproof device that detects water leaks with ultra-high sensitivity (0.5mm) using four sensor probes. It connects directly to 2.4GHz WiFi without needing a hub, sending instant app and email alerts alongside a powerful 100dB alarm. Designed for versatile placement in kitchens, bathrooms, basements, and more, it offers up to 24 months of battery life and integrates smoothly with major smart home platforms for proactive home protection.
























































| ASIN | B0CRRL9DNN |
| Batteries | 2 AAA batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Battery description | Alkaline |
| Best Sellers Rank | 8,634 in DIY & Tools ( See Top 100 in DIY & Tools ) 2 in Water Detectors |
| Control method | App |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,530) |
| Date First Available | 8 Jan. 2024 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Included Components | AAA Battery, User Manual, Warranty Card, Water Leak Detector |
| Item Package Quantity | 1 |
| Item Weight | 68 g |
| Item model number | W4402000 |
| Item weight | 68 Grams |
| Manufacturer | Wonderlabs |
| Material | ABS |
| Maximum range | 120 Metres |
| Mounting type | Floor Mount |
| Noise level | 100 Decibels |
| Number of batteries | 2 AAA batteries required. (included) |
| Part Number | W4402000 |
| Product Dimensions | 4.2 x 8.2 x 8.5 cm; 68 g |
| Sensor technology | Water Sensor |
| Shape | Detector (1 Pack) |
| Style | Water Detector*1 |
| UPC | 810150540437 |
| Voltage | 3 Volts |
N**O
Smart, Well Designed & Home Assistant Ready – Spot on from SwitchBot
I couldn’t be more impressed with this leak detector. The cabled version is fantastic value, effectively giving you three sensors in one. The engineering is smartly thought out — the top-mounted sensor sits in a dished recess, which cleverly allows drips to collect and trigger the alarm more quickly. It also has a built-in alarm for immediate local alerts, which is a lifesaver if you’re nearby. Connectivity is excellent: it works flawlessly with the SwitchBot app and cloud services, but it also integrates perfectly with Home Assistant via ESP32. In fact, setup with HA was even faster and more seamless than with the official app. Someone mentioned it didn’t work, personally didn’t have a single issue getting it to work. It was picked up by ESPHome instantly. I was torn between this and the Eufy option, but honestly this has far more bells and whistles, and the Home Assistant functionality is spot on — exactly what I needed for my setup. The build quality, design, and reliability are outstanding. I had the unfortunate experience of a copper pipe bursting (after rubbing against a rusty RSJ), which flooded two rooms in my office. I only wish I’d bought this device sooner — it would have saved me a lot of hassle. If you’re looking for a well-designed, highly reliable, and affordable leak detector, this is absolutely the one to get. ⭐ ⭐ ⭐ ⭐ ⭐
M**S
Brilliant Water Sensor!
The SwitchBot WiFi Water Sensor is an absolute game-changer for home protection! Setting it up was a breeze — just connect it to your 2.4Ghz Wi-Fi, and you're good to go. No extra hub needed, which is a huge plus. The app is intuitive and user-friendly, delivering real-time alerts straight to your phone whenever it detects leaks, drips, or flooding. It’s fantastic for peace of mind, especially when you’re not home. The build quality is impressive, with an IP67 waterproof rating, making it perfect for kitchens, bathrooms, basements — pretty much anywhere. The sensitivity of this thing is unreal. It has four sensor probes and can detect even a tiny 0.5mm water level! And if something goes wrong, the 100dB alarm ensures you won’t miss it, even from afar. The app integration is smooth, and I love how it works with Alexa, Google, Siri, IFTTT, and SmartThings. It even pairs with the SwitchBot ecosystem, letting you control other devices if a leak occurs. All in all, this little device packs a serious punch. It's reliable, well-built, easy to set up, and the app makes everything super convenient. Highly recommend!
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!
S**W
SwitchBot Wi-Fi Water Sensor Works really well
The SwitchBot Wi-Fi Water Sensor is an impressive device that combines convenience, reliability, and smart home integration to give you peace of mind when it comes to potential water leaks. Here’s my breakdown after using it for a few weeks: Design and Build The sensor has a sleek and compact design that easily fits in tight spaces like under sinks, near washing machines, or around water heaters. It feels sturdy and well-made, capable of withstanding minor mishandling. Ease of Setup Setting up the SwitchBot Water Sensor is incredibly simple. The device pairs effortlessly with the SwitchBot app, and the step-by-step instructions are clear. It connects via Wi-Fi, so you don’t need a separate hub, which is a big plus. Performance The sensor is highly sensitive and reliable. During my tests, it detected even small amounts of water quickly. The dual detection system, which senses both water and high humidity, is a fantastic feature for versatile monitoring. The notifications sent to my phone were instant, allowing me to address potential issues promptly. Battery Life Powered by AAA batteries, the sensor boasts an impressive battery life of over a year, depending on usage. The app conveniently notifies you when the battery is running low. Smart Home Integration One of the standout features is its compatibility with Alexa, Google Assistant, and other smart ecosystems. I’ve set mine up to trigger routines, such as turning off my smart water valve when a leak is detected. The integration works flawlessly. Value for Money Priced competitively, the SwitchBot Water Sensor provides excellent value, especially given its accuracy and smart home capabilities. It’s an affordable insurance policy against potentially costly water damage. Pros: Compact and durable design. Quick, reliable water detection. Easy to set up and use. No hub required (Wi-Fi enabled). Smart home integration with automation support. Long battery life. Cons: Limited color options (only available in white). Slightly higher initial cost compared to basic water sensors, though justified by features. Final Verdict The SwitchBot Wi-Fi Water Sensor is a must-have for any smart home enthusiast or anyone concerned about water leaks. Its reliability, ease of use, and excellent integration make it a standout choice in its category. Whether you want to safeguard against leaks or add another smart gadget to your home, this sensor won’t disappoint. Rating: 4.8/5
D**K
Brilliant sensor. Good value
Hopefully it will never really sound the alarm but had it for a while and battery is still going strong. Tested it at the beginning and works great. Left it behind the cupboard so in case of any leak in that place will know straight away. Good value for money for a peace of mind. Sensitivity is great. Once metal pin get in contact with water it sound the alarm. You can set the loudness of the alarm in the app.
A**R
Easy to set up, easy to use. Handy multiple points with the cable to get it into difficult spaces. Also works with Homey.
L**N
J’ai acheté le détecteur de fuite d’eau SwitchBot pour sécuriser mon appartement, et j’en suis très satisfait. L’installation est ultra simple : il suffit de placer le capteur à l’endroit souhaité et de le connecter à l’application SwitchBot, sans besoin de hub supplémentaire. Je l’ai installé sous mon chauffe-eau et je prévois d’en installer un autre prochainement sous mon évier équipé d’un système de filtration avancé. Le détecteur est très sensible, il réagit immédiatement à la moindre trace d’eau et déclenche une alarme sonore. J’apprécie aussi la réception de notifications instantanées sur mon smartphone, ce qui me rassure même lorsque je ne suis pas chez moi. Le design est compact et discret, il se glisse facilement sous un évier ou près d’une machine à laver. L’autonomie annoncée est excellente, et il fonctionne avec des piles classiques. Le rapport qualité-prix est vraiment bon pour un appareil connecté de ce type. Je recommande ce détecteur à tous ceux qui veulent éviter les mauvaises surprises liées aux fuites d’eau !
S**O
El SwitchBot WiFi Sensor de Agua es un dispositivo inteligente que cumple perfectamente con su función. Ya tengo detectores de otras marcas en la cocina, junto a la lavadora y el lavavajillas, pero me decidí por este modelo porque SwitchBot está destacando en el sector. Su aplicación es intuitiva y permite una configuración rápida, además de utilizar un tipo de pila accesible. Lo más importante para mí era que emitiera una alarma potente en caso de detectar agua, y lo hace de forma impecable con un sonido ajustable. Lo he instalado junto al desagüe del aire acondicionado, ya que en ocasiones se emboza, y la tranquilidad que aporta es inigualable. Además, su certificación IP67 garantiza resistencia al agua, y el hecho de que no necesite un hub simplifica mucho su uso. Sin duda, una compra recomendable para proteger cualquier espacio de posibles fugas.
L**A
Wij hadden regelmatig last van harde regen die door een kier bij het raam naar binnen komt. Nu worden we gewaarschuwd als de vensterbank nat wordt, nog voordat de vloer blank staat. Duidelijk hoorbare meldingen (instelbaar) en notificaties in de Switchbot-app.
O**S
This works as advertised. I used it as a remote tank monitor as it filled several miles from where I was. When the tank filled to the level I had placed the probe, I was notified by the switchbot and went and turned the water off. This freed me up for other things and not tied down watching the water level. Worth every penny I paid.
Trustpilot
1 month ago
5 days ago