If you’d like to get some hard data on your water usage, have a look at [Josh EJ]’s Sensible Flow project. It contains designs for a set of sensors ... home use, such as this neat ESP8266 ...

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 LEDs, tamberg set up the device to change ...

The latest solution comes courtesy of [Keilin Bickar], who’s using the ESP8266 and a serial TTL camera module to read the characters from the LCD of his water meter. With a 3D printed enclosure ...

Mechanical water meters also do not work well when the water flow is low. Vortex water flow meters use vortices shed from a sensor immersed in the flow. Vortices are forces of nature, “swirls” ...