SwitchBotWiFi Water Sensor, Smart Water Leak Detector, 100dB Adjustable Alerts & App Alerts, IP67 Waterproof, Wireless Detector for Kitchen, Bathroom, Basement, No Hub Required (Support 2.4G) (3)

If you have Home Assistant for home automation and need some leak sensors these work great (as of the 2025.01 release of Home Assistant). But you need to understand how they work1) They only work over bluetooth. This is good, keeps the battery life long2) You need some whole house bluetooth receivers. If you happen to have shelly devices with the bluetooth capability (Like the plus series) then you're all set. Because Home Assistant can configure the shelly switches to listen and pickup bluetooth signals from all over the house.If you have these things, then setup is easy. Pop the included AAA batteries in, check Home Assistant and it will say it detected a Switchbot Leak Detector. Click "Yes, set it up" and you're done (but give it a better name). Shows up with the proper icon (water drop) and type (moisture).Now the real fun is the automation. I have a zwave whole house water shutoff device. It will turn the quarter turn valve on my incoming water line to my house. I grouped all my leak detectors and created an automation that says "If the group (IE any one of the group) detects water then shut off the whole house water valve". Tested it out and within 1-2 seconds of a water drop the valve is turning off. It also sends me a notification too.The sensors themselves are very sensitive. The top is dished a little so if a single drop of water hits the top it will likely set it off. The bottom contacts are pretty sensitive too but would take a very small puddle just due to how the sensor is on the bottom and water spreads.They do have an alarm too, it's not super loud, but it will get your attention if you're in the same room. Mostly though I bought them for the Home Assistant integration. There are cheaper sensors if you just want an alarm when water hits them.Water damage is the worst thing for a house, and also the most likely. Toilets, sinks, washing machine, water heater, anything with water should have a sensor next to it and ideally some automation to cut the water. In 20 years of home ownership I've only had 2 major issues and both were water related (water heater once, washing machine second). I'm all prepared to never have another one (fingers crossed!) I have 12 of these spread out around my house.

Living on 2nd floor, needed to mitigate potential for damage to self and 1st floor. Setting up 1st sensor a bit tricky but c.s. assisted. Rest were easy. Tested and these are very responsive when exposed to even a drop of water. App alerts immediately. Can name each so you know exactly which is setting off alarm. Got 2 with probe for behind washing machine and dishwasher, several others without probe. Extreme peace of mind.

Had a drainage backup that crept water up thru the floor drain in the basement. Luckily I had walked downstair to my office and smelled wetness. S-O-B! Why now? There's no good time! I remedied the problem, cleaned up the mess, and purchase the water monitors. I already have the SwitchBot camera's and Hubs. So this was a No Brainer. Had a little trouble linking but managed and got working. The instructions? No awards for Simple English. Hopefully No next time but if I do I'll get notified. Most likely when I'm on vacation right? This alarm works as it should and I'm Happy.

This little bugger could save a lot of money by detecting a small leak before it becomes a large one. I use mine in the well house. I ordered 3 more for the kitchen sink and bath sink cabinets and washer area. This small box fits almost anywhere and works great at detecting very small leaks. It was a snap to connect. It seems to work well even submerged for a short time.

My father suffers from dementia -- I care for him from home - he overflows the bathroom sometimes - but this now notifies me for sink and toilet - a loud beep and also on my phone

Quality, Design, App quality, notifications, and price: 5/5 each.Works well. Thank you!

It works as advertised without exception and it is cheap. I am buying another.

These sensors are awesome. Detected a basement leak and saved me hundreds of $$ and hours of work because I was able to address the source BEFORE it became a big issue. This was worth every penny. I have installed the others in the laundry room and my travel trailer.