Had a leak under the sink in our kitchen. I don’t want to imagine what this would have meant on a larger scale, compared the 20€ I spent on the sensor and the 10mins it costed me to install it.
this post was submitted on 05 Feb 2025
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Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
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what model sensors are these? are they Z-wave? how long does the battery last?
I'm very interested in a similar setup.
Looks like an Aqara leak sensor. Zigbee - you generally won't find Z-wave devices for this cheap. They were around US$15 on Amazon when I last bought some in 2023, and a dollar or two cheaper on Aliexpress.
Pretty basic construction. There's two exposed terminals at the bottom, and when they connect electrically, it alerts. If you're clever, they can be used for a bunch of things, not just leak sensing (eg https://www.homeautomationguy.io/blog/making-my-own-bed-sensor).
I'm curious. Like what?
A door opening contact sensor.
Aqara have good door and window sensors too
You can buy these at around the same price or less, so no point in doing that
Edited my post to include a link - someone used it for a bed occupancy sensor: https://www.homeautomationguy.io/blog/making-my-own-bed-sensor
Some days I don't wet the bed, how will it recognize my presence without a steady stream of moisture?
Seeing how much liquid you can pee?
I use the water sensors from Aqara and integrated them with a Sonoff zigbee USB stick.
I have the ikea ones (using zigbee), the two aaa batteries in there last about 1/2-1 year.
While not the same as the pictured ones, I can really reccomend them.
Was going to suggest the IKEA one. Pretty decent to use and has a local speaker if you don't have any home assistant devices near by.
The door contacts are good too but I found that I had to connect them a few times before they would register on ZHA