eufy Water and Freeze Sensor with Remote Alerts

They detect liquid… so they work

It works No complaints

Effective

Well built and seems to be very effective - tested by placing in puddle of water(not submerged)and the sensors activated instantly. Notfication via phone by far is fast. Just add battery, place cover correctly, add to system app and you are good to go. Price is at par - affordable. I'm adding more around the house i.e. under sinks and behind toilet seats. Good idea to place another one next to the water heater tank. Highly recommended.