after a leak under my basement sink caused quite a mess, i installed the Yolink leak detector system. its WIFI, so you have to have active wifi available. i got it thru Amazon. works great. i also added freezer, refrigerator temp alarms, and added transmitters in wifes greenhouse and potting sheds. the greenhouse is 300' away from hub and works great. never drops out. can set alert levels. i installed the temp transmitters in the doors of the freezer, and one time i got an alert while i was at work. i called the wife, and she told me she was cleaning the freezer and had the door open for about 30 minutes.
Moen also offers a leak detector and a water shut off device. system is called FLO. ive installed these in cabins.