this post was submitted on 05 Feb 2025
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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.

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[–] mark@infosec.pub 22 points 1 month ago (3 children)

what model sensors are these? are they Z-wave? how long does the battery last?

I'm very interested in a similar setup.

[–] dan@upvote.au 22 points 1 month ago* (last edited 1 month ago) (1 children)

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).

[–] scytale@lemm.ee 6 points 1 month ago (3 children)

hey can be used for a bunch of things, not just leak sensing.

I'm curious. Like what?

[–] Rentlar@lemmy.ca 5 points 1 month ago (2 children)

A door opening contact sensor.

[–] dan@upvote.au 6 points 1 month ago

Aqara have good door and window sensors too

[–] spitfire@lemmy.world 4 points 1 month ago

You can buy these at around the same price or less, so no point in doing that

[–] dan@upvote.au 3 points 1 month ago (1 children)

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

[–] RvTV95XBeo@sh.itjust.works 10 points 1 month ago

Some days I don't wet the bed, how will it recognize my presence without a steady stream of moisture?

[–] Empricorn@feddit.nl 1 points 1 month ago

Seeing how much liquid you can pee?

[–] jamhmgenau@feddit.org 3 points 1 month ago

I use the water sensors from Aqara and integrated them with a Sonoff zigbee USB stick.

[–] needanke@feddit.org 2 points 1 month ago (1 children)

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