If you're looking for ways to use less water, Instructables user tamberg developed a DIY water faucet sensor that shows you when you've used up a liter. Using an Arduino, flow sensor, and colored ...

Flume’s Home Water Protection Service provides 24/7 water flow monitoring across an entire home and property, utilizing Wi-Fi connectivity and a sensor easily connected to the existing water meter.

IKEA as updated its Home smart app, meaning the new BADRING Water Leakage Sensor can now be added. Whilst it's not yet available to purchase, this suggests the sensor isn't far away.