I’m not a huge gearbest fan, but it looks like these water sensors are a pretty good deal at $12.99.
https://www.gearbest.co
I believe these are relatively new so the smartthings community is just getting started on them, but someone else was able to pair it. Getting the battery level to show seems like it still might be a work in progress however.
https://community.smart
I also ordered the Xiaomi Aqara Temperature Humidity Sensor to put in the wine fridge, pretty good deal for $9.
https://www.gearbest.co
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